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Maintenance & Repair Library

The honest answers
your plumber would give you
at the kitchen table.

Six guides written by our NATE-certified, NJ-licensed master techs. No SEO fluff, no sales pitch — just what we'd tell a friend across our 17 years in the trade.

6 articles · Last updated April 2026 · Updated quarterly

All Articles

// 06 pieces
Maintenance

How Long Does a Water Heater Last in New Jersey?

Hard water, cold winters, and your gas pressure all matter. Here's what we see in the field.

Most homeowners ask us this after a tank fails at the worst possible moment. The honest answer: a typical tank water heater lasts 8 to 12 years in Northern New Jersey — but we've replaced 14-year-old units that were perfectly maintained, and 5-year-old units killed by sediment buildup. Here's what actually drives the difference.

The four numbers that matter

When our techs assess a water heater on a service call, we look at four things in this order:

  • Age — On the rating plate, look for the manufacture date. Most NJ-installed units are dated by month/year (e.g., "0918" = September 2018). If it's older than 8 years, you're on the back half of its life regardless of how it looks.
  • Anode rod condition — This sacrificial rod is the #1 reason water heaters fail early. Once it's gone, the tank itself starts corroding from the inside. Most homeowners have never seen one.
  • Sediment buildup — In Paterson, Clifton, and most Passaic County towns, water hardness runs 7–11 grains per gallon. That sediment cooks onto the bottom of your tank, reduces efficiency, and accelerates the steel's failure.
  • Recovery time — How long after a hot shower until the next person can take one? If it used to be 20 minutes and now it's 45, your dip tube or burner is failing.

Signs your water heater is on its last 6 months

  1. Rusty hot water — but only on the hot side. (If both sides are rusty, it's probably your supply line, not the tank.)
  2. Popping or rumbling sounds from the tank — that's water trying to bubble through a layer of cooked sediment.
  3. Pooling at the base — even a quarter-cup of water around the drain pan means the tank wall is breached.
  4. Inconsistent temperature — hot, then suddenly lukewarm, then hot again, especially mid-shower.
  5. Pilot light won't stay lit on gas units, or breakers tripping on electric.

What we recommend by age

AgeActionCost range
0–5 yearsAnnual flush + anode check$129–179
6–8 yearsAnode replacement + flush$249–349
9–11 yearsPlan for replacement; aggressive maintenance$1,800–2,400 (replace)
12+ yearsReplace before it fails on its own$1,800–2,400

Heat pump or standard tank?

This comes up on every install consultation. In our experience across 2,800+ NJ installs, here's the reality: heat pump water heater wins on energy bills (15–25% savings on a typical household) and lifespan (20+ years vs 10), but tank wins on upfront cost and reliability when your gas line is undersized — which is true in a lot of older Paterson and Newark homes built before 1970. Don't let a salesperson talk you into heat pump water heater if your gas main is ¾" — you'll either get cold showers in winter or pay $2,000+ for an upgraded gas line.

The 5-minute self-check

Once a year, do this:

  1. Turn off the cold supply valve (top of the tank).
  2. Open a hot water tap somewhere in the house — this prevents vacuum.
  3. Attach a hose to the drain valve at the bottom.
  4. Run it into a 5-gallon bucket. If sediment looks like coffee grounds — schedule a flush.
  5. Close everything back up, including the cold supply.
🛡️
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A free no-pressure assessment from one of our master plumbers takes 15 minutes — we'll read your unit, check your anode, and tell you honestly how much life is left.
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Common questions

How often should I flush my water heater?
Once a year for tank units, every 6 months if you're in a hard-water area like Paterson, Clifton, or Wayne. Heat Pump units need an annual descaling.
Can I replace the anode rod myself?
Technically yes, but the hex head on top is usually torqued to 100+ ft-lbs and stuck after 5 years of corrosion. Most DIYers strip it. Budget $80 for the rod and $179 for a tech to swap it — or watch us do it on YouTube and try once.
Is hot water always supposed to come out fast?
Not at first — there's always cold water sitting in the pipe between your tank and the faucet. But once it arrives, flow should be steady. If it sputters or fluctuates, you have either a dip tube failure or a partially-clogged outlet.
How much does a water heater install cost in NJ?
For a like-for-like swap of a 40 or 50 gallon tank: $1,800–2,400 including unit, permit, haul-away, and warranty. Heat Pump installs run $4,200–6,500 depending on whether your gas line and venting need work.
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Emergency Prep

Frozen Pipe Prevention: A Northern NJ Survival Guide

Every winter we get 30–40 burst-pipe calls between Christmas and Valentine's Day. Almost all of them were preventable.

When the temperature drops below 20°F for more than a few hours, pipes in unheated walls, basements, attics, and crawlspaces start freezing. By the time you notice, it's often too late. Here's the playbook our techs use, and what to do if a pipe has already burst.

The 4 places pipes freeze in NJ homes

  1. Exterior wall plumbing — kitchen sinks on outside walls (super common in Newark and Hackensack pre-1960 homes).
  2. Garage walls — especially if there's a laundry sink or hose bib on a shared wall.
  3. Crawl spaces — the worst offender, because nobody checks until the floor is wet.
  4. Basement supply lines near rim joists — air leaks at the top of the foundation drop the temp 30°F.

The 24-hour prep before a freeze

When the National Weather Service forecasts a hard freeze, do these four things that morning — they take 20 minutes total.

  • Open cabinet doors under any sinks on exterior walls. Warm room air needs to circulate around the supply lines.
  • Trickle the most-vulnerable faucets — pencil-lead-thin stream. Running water doesn't freeze, and the open spigot relieves pressure even if a pipe deeper in the wall does.
  • Disconnect garden hoses. A connected hose holds water in the spigot, which freezes and splits the pipe behind the wall.
  • Set the thermostat to 65°F minimum — even when nobody's home. Saving $15 on heat to face a $4,000 burst-pipe repair is the worst trade in NJ home ownership.

If a pipe has already frozen (no break yet)

You'll know because a faucet won't run, or only drips. Don't panic — most frozen pipes can be thawed without bursting if you act fast:

  1. Find the closest section of pipe — usually you can hear or feel where the cold spot is. If it's behind drywall, look for the section nearest a cold exterior wall.
  2. Open the faucet connected to that line — fully open, both hot and cold.
  3. Apply heat with a hair dryer, heating pad, or hot towels — never an open flame, propane torch, or kerosene heater. Start at the faucet end and work back toward the freeze.
  4. Keep heat on until full water flow returns.
⚠️
Don't apply heat to a section that's already burst. If you see ice expanding, drywall bulging, or hear water inside the wall — shut off your main valve immediately and call a plumber. Heating a burst pipe just speeds up the flood.

If a pipe has burst

You have about 90 seconds before the damage compounds. In order:

  1. Find your main shutoff. Most NJ homes have it where the water line enters — basement, crawlspace, or utility room. If you don't know where it is, find it now, before you need it.
  2. Turn it clockwise until it stops. The water in the pipes will keep running for a minute as it drains.
  3. Open every faucet in the house, hot and cold. This empties the lines and prevents secondary freezes.
  4. Call a plumber. If you're in our area, we have 24/7 dispatch. A tech can be on-site in 90 minutes or less.
  5. Document everything for your insurance — photos before you start cleanup, video walking through the affected rooms.

Prevention upgrades worth doing

If you've had a frozen pipe even once, fix the root cause before next winter. Cost-benefit ranking:

UpgradeCostWorth it?
Pipe insulation foam (DIY)$30–60Yes — every time
Heat tape on most-exposed runs$120–250Yes — for crawl spaces
Frost-free hose bib install$280–420Yes — pays back in 1 freeze cycle
Reroute exterior-wall supply lines$800–1,800Only after 2nd burst
Foam-fill exterior wall cavity$1,200+Only with full insulation reno
🚨
Pipe burst right now?
Real dispatcher answers in <20 seconds. Tech assigned before you hang up. Coverage across Passaic, Bergen, Essex, and Morris counties — 90 minutes guaranteed or $50 off.
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How cold does it have to be for pipes to freeze in NJ?
Generally, 20°F sustained for 6+ hours is the threshold for unprotected pipes. But pipes in poorly-insulated walls can freeze at 28°F if there's wind exposure.
Will my homeowner's insurance cover a burst pipe?
Most NJ standard policies cover sudden burst-pipe damage but exclude damage from pipes that froze because the homeowner left the home unheated. If you're traveling, leave the heat at 60°F minimum and have someone check on the house.
Should I leave the heat on if I'm leaving for vacation in winter?
Yes — minimum 60°F, ideally 65°F. The savings from turning it down aren't worth the risk. Even better: have the system winterized professionally if you'll be gone for more than two weeks.
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HVAC

When (and Why) to Service Your HVAC: Real Talk From a NATE Tech

Manufacturers say twice a year. We say it depends. Here's what actually matters.

Every spring and fall we get the same question: "Do I really need to pay $189 for a tune-up if my system is working fine?" The honest answer is no, not always — but skipping it for 3+ years in a row is how mid-life systems become expensive replacements. Here's how to think about it.

What a real HVAC tune-up actually includes

A legitimate tune-up is 60–90 minutes of work, not a 20-minute filter swap. If your tech is in and out in under 45 minutes, you didn't get a tune-up — you got a checkbox visit. Here's what should happen:

  • Refrigerant pressure check on AC systems — both high and low side, with the system running for at least 15 minutes to stabilize.
  • Capacitor and contactor inspection — these are the #1 failure point on residential AC. A weak capacitor reads in spec at rest but fails under load.
  • Coil cleaning — both indoor evaporator and outdoor condenser. A coil with 40% blockage reduces efficiency by 30%.
  • Drain line flush — clogged condensate lines are the #1 callback we see in summer.
  • Burner inspection on furnaces — flame color, ignition pattern, gas pressure, heat exchanger crack check.
  • Blower amp draw — comparing actual to nameplate amps catches a failing motor before it dies in February.
  • Thermostat calibration and electrical connections tightened.

The honest schedule

System ageHeating tune-upCooling tune-up
0–5 years (under warranty)Yes, annual — required to keep most warranties validYes, annual
6–10 yearsAnnualAnnual
11–15 yearsTwice a year — it's earning its keep on borrowed timeTwice a year
16+ yearsEvery visit might be the last; budget for replacementSame

The 6 signs you actually need service NOW (not waiting for the season)

  1. Higher bills with no usage change. Compare this month to the same month last year. A 25%+ jump means efficiency loss — usually refrigerant, dirty coils, or a failing motor.
  2. Hot and cold rooms in the same house. Could be a duct leak, a stuck damper, or a failing zone control. Don't just keep adjusting the thermostat — diagnose it.
  3. Short cycling — system kicks on and off every 3–5 minutes. Almost always a sensor, low refrigerant, or oversized system.
  4. New noises. Squealing on startup = bad blower bearing. Buzzing at the outdoor unit = capacitor about to fail. Banging from ductwork = expansion from delayed startup.
  5. Visible rust or rust water at the indoor unit. The drain pan is failing or already failed.
  6. Strange smells. Musty = mold in the ducts or coil. Burning electrical = stop using it and call. Sulfur = gas leak, evacuate and call the gas company.

What to ask your HVAC tech before they leave

If you're paying $150–250 for a tune-up, get your money's worth. Before they pack up:

  1. "What were the refrigerant pressures, and are they in spec?"
  2. "Did you measure the capacitor — what was it rated and what did it test at?"
  3. "What's the current state of the heat exchanger / coil?"
  4. "Anything you'd recommend addressing in the next 12 months?"
  5. "What's your honest read on how many seasons this system has left?"

A tech who can answer those crisply did the work. One who hedges or changes the subject — get a second opinion.

The maintenance plan question

Most HVAC companies offer "club" plans — pay $15–25/mo, get two tune-ups + priority dispatch + 10–15% off repairs. Are they worth it?

Yes if: your system is 6+ years old, you'd otherwise skip tune-ups, and the company actually has techs in your area (not contractors driving in from 2 hours away).

No if: your system is brand new and under warranty (you're paying twice), or the plan locks you into using only their parts.

🔧
Get a real tune-up — not a checkbox visit
Our NATE-certified techs spend 60–90 minutes on every system. Full diagnostic, written report, no upsells. $189 flat or included free in our Rescue Club ($19/mo).
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Should I replace my HVAC before it dies?
Generally yes if it's 15+ years old and you'd be replacing within 2 years anyway. New 16-SEER systems can cut your cooling bills 30–40%, and an emergency replacement in July costs 20% more than a planned one in October.
How often should I change my HVAC filter?
Standard 1" pleated filter: every 60–90 days during heavy use seasons. 4" media filter: every 6–12 months. Got pets or allergies? Cut those intervals in half.
Is it bad to set my thermostat to 60 when I'm gone?
For short trips, totally fine. For multi-week vacations in winter, raise it to 65 to protect plumbing. In summer you can go up to 80 — but if you're in NJ humidity, anything above 80 risks indoor mold growth.
Why does my AC freeze up?
Three causes, in order: dirty filter (80% of cases), low refrigerant (15%), failing blower motor (5%). Turn it off, let it thaw 4 hours, change the filter — if it freezes again within a week, call a tech.
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Drains

Drain Snake vs. Hydro-Jet: Which One Do You Actually Need?

When the tub backs up, the cheapest solution is rarely the right one.

"Just snake it" is the most common request we get on drain calls — and the most common reason we're back at the same house six months later. Snaking and hydro-jetting solve different problems. Here's how to know which one your situation needs.

What each tool actually does

Drain snake (auger)

A flexible metal cable with a cutting tip. Spins through the drain, breaks up or hooks into a single blockage, pulls it back out. Reaches 25–100 feet depending on the machine. Punches a hole through the clog so water can flow again.

Hydro-jet

A pressurized water nozzle (3,000–4,000 PSI) on a high-pressure hose. Cleans the entire inner wall of the pipe by force, removing grease coatings, soap scum, hair, mineral deposits, and root intrusion. Reaches 200+ feet. Restores pipes to near-original diameter.

The decision tree

Use this in order. If you answer yes at any step, that's your call.

  1. Is this the first time this drain has clogged in 12+ months? → Snake will probably fix it.
  2. Is the clog a single object you can identify? (kid's toy, paper towels, hair ball) → Snake.
  3. Is it the kitchen sink, and you cook a lot of bacon / oil / fried food? → Hydro-jet. Snaking grease just punches a tunnel through it; the walls are still coated.
  4. Is it the main sewer line, with mature trees in the yard? → Hydro-jet. Roots cause re-clogs in 60–90 days after snaking. Jetting cuts and flushes them out.
  5. Has this drain backed up 2+ times in the last year? → Hydro-jet. The walls are coated and you've been treating symptoms, not the cause.
  6. Are you smelling sewer gas or seeing slow drains in multiple fixtures simultaneously? → Hydro-jet on the main line. You have a partially-collapsed or heavily-coated main.

Cost comparison (NJ averages)

ServiceCost rangeTypical durationRe-clog risk
Snake (single drain)$149–24920–45 min30–50% within 6 months for grease/root issues
Snake (main sewer)$249–39945–90 min40–70% within 12 months if roots present
Hydro-jet (single drain)$349–54945–90 min<5% within 12 months
Hydro-jet (main sewer)$549–89990 min–3 hr<10% within 24 months
Camera inspection$149–24930 min(diagnostic only — included with most jet jobs)

Why a "$99 drain cleaning" coupon is almost always a trap

You've seen the ads. Here's what's actually happening: the company sends a tech with a small electric snake, runs it 25 feet, hits the closest blockage, calls it done. The clog two feet past where they reached re-blocks within weeks. Then on the second call, suddenly there's "an emergency" and "this needs jetting" — for $700.

If your drain is more than a one-time hairball, paying $99 + $700 is worse than paying $549 once. We know because customers tell us this story every week.

The case for camera inspection

For mainline issues — anything past your sink trap and into the wall or below the foundation — a camera inspection before you commit to a fix is almost always worth it. Here's what a camera tells you that nothing else can:

  • Whether the pipe itself is broken, collapsed, or just clogged.
  • Where exactly the problem is — to the inch.
  • What pipe material you have (cast iron, clay, PVC, Orangeburg) — which determines whether jetting is even safe.
  • If there are root intrusions, how extensive they are.
⚠️
Don't hydro-jet old Orangeburg or deteriorated cast iron. 4,000 PSI will blow holes through it. A reputable tech runs the camera first if there's any chance the pipe is failing — if they refuse, walk away.
📹
Free camera inspection with hydro-jet jobs
We always camera before we jet. You see what we see, on your phone. No mystery diagnoses, no surprise upsells.
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Can I rent a hydro-jet from Home Depot?
You can rent small electric jetters (1,500 PSI), but they won't touch grease coating or root intrusion — those need 3,000+ PSI. The rental machines are for clearing slow drains, not problem mains.
Are drain chemicals (Drano, Liquid Plumr) safe to use first?
For a one-time slow drain — sure, occasionally. Long term they corrode pipes, especially older galvanized steel and PVC joints. We've replaced enough $400 sink traps to recommend you skip them.
Will jetting damage my old pipes?
Not if the tech runs a camera first and adjusts pressure for pipe condition. We jet 1920s cast iron and 1970s PVC every week — but always with eyes on what we're working with. Refuse any tech who won't camera before jetting an old line.
How often should main sewer lines be cleaned?
If you have mature trees and the original cast-iron main, every 18–24 months as preventive. Modern PVC mains with no nearby root sources can go 5+ years between cleanings.
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Code & Permits

When You Need a Plumbing or HVAC Permit in NJ (And When You Don't)

Spoiler: "my buddy can do it" is usually how a sale falls through six months later.

Every week we get called to fix work that was done without a permit. Sometimes it's a botched DIY install; more often it's a friend-of-a-friend who's an actual plumber but skipped the paperwork. Here's the honest map of what NJ requires, what it costs, and why it matters more than people think.

The NJ uniform construction code basics

New Jersey operates under the Uniform Construction Code (UCC). Most plumbing and HVAC work falls into one of three buckets:

Bucket 1: No permit needed (simple repair)

  • Replacing a faucet, sink, toilet, or showerhead with a like-for-like unit (no relocation, no line changes).
  • Replacing a garbage disposal with the same horsepower model.
  • Clearing clogs, snake, hydro-jet, and camera inspections.
  • Standard service work: anode rod replacement, capacitor replacement, fan motor swap.
  • Most appliance installs that connect to existing supply (dishwasher, washing machine).

Bucket 2: Plumbing/Mechanical Permit Required

  • Water heater replacement (yes, even like-for-like — UCC §4.7).
  • Furnace, boiler, AC, or heat pump replacement.
  • Heat pump water heater conversion or new install.
  • Adding a new fixture (bathroom, laundry, outdoor sink).
  • Relocating any plumbing line.
  • Gas line work — new lines, modifications, or appliance reconnections.
  • Water main repair or replacement.
  • Sewer line repair or replacement.
  • Backflow preventer install.

Bucket 3: Plan Review + Permit Required

  • Bathroom additions or full renovations with new fixtures.
  • Kitchen remodels with relocated plumbing.
  • Whole-house re-piping.
  • Commercial work (almost always plan review).
  • Any structural plumbing modifications (joists, foundation penetrations).

Permit costs (Northern NJ averages)

Work typeTypical permit feeInspections
Water heater swap$70–1201 (final)
Furnace replacement$100–1801–2 (rough + final)
AC condenser replacement$80–1501 (final)
Bathroom remodel$200–4502–3 (rough plumbing, rough mechanical, final)
Sewer line replacement$250–5002 (open trench + backfill)
Gas line modification$120–2801–2 (pressure test + final)

Compare those to the cost of the actual work — permit fees are usually 5–10% of the project total. Not the place to save money.

Why the permit actually matters

1. Insurance implications

Most homeowner's insurance policies exclude losses from work done without proper permits. We've seen claims for water damage from a non-permitted water heater install denied for exactly this reason. The customer paid $4,200 for floor restoration out of pocket because they "saved" $90 on a permit.

2. Sale of the home

NJ sellers' disclosure forms ask about permits explicitly. Buyers' inspectors will spot a non-permitted water heater (no inspection sticker), gas line (paint mismatch on the meter), or HVAC swap (newer label on old electrical disconnect). Result: the deal renegotiates, with the seller paying to redo it correctly. We've fixed $3,000 worth of "savings" that cost $11,000 at closing.

3. Safety codes change

The 2024 NJ residential code requires sealed-combustion water heaters in many basement applications. A 2020 install that was code-compliant then might not be now — but a permitted install gets a paper trail showing it was legal at install date. A non-permitted one looks like negligence.

4. Workmanship accountability

Permits create an inspection record. If something fails 3 years later, you have proof a third party signed off — not just the installer's word. This matters for warranty claims and contractor disputes.

What to ask before any plumbing/HVAC work starts

  1. "Will you be pulling a permit on this job?"
  2. "What's the permit fee, and is it included in your quote?"
  3. "Who will be the inspector — town or third-party?"
  4. "When will I get a copy of the permit?"
  5. "How do I verify it was closed out correctly after the inspection?"

Any contractor who hedges, says "we don't usually do that for this kind of work," or offers a "cash discount" if you skip the permit — that's the sound of someone who can't or won't pull one. Walk away.

📋
Every job we do is permitted and inspected
We pull the permit, pay the fee, schedule the inspection, and hand you the closed-out paperwork — included free with every install. NJ Master Plumber Lic. #PL-042198.
Book a permitted install →
Can I pull my own permit as a homeowner?
For your primary residence, yes — NJ allows owner-as-builder permits for most plumbing and mechanical work. You'll be the responsible party and required to do the work yourself. You can't pull an owner permit and then have a friend do the work; that's permit fraud.
What happens if my contractor doesn't pull a permit?
The work isn't legally compliant. You can be required to remove or redo it when discovered, and you may have no recourse against the contractor. File a complaint with the NJ DCA's Bureau of Construction Code Services if it happens to you.
Do I need a permit for a heat pump water heater conversion?
Always yes in NJ. Heat Pump installs change gas demand, venting, and electrical — all of which require inspection.
How long does the permit process take?
Same-day to 5 business days for most residential plumbing/HVAC permits. Plan review (kitchens, baths, commercial) takes 2–4 weeks. Reputable contractors handle this start to finish — you shouldn't need to talk to the building department yourself.
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HVAC

AC Running But Not Cooling: A Diagnostic Walkthrough

Six things to check yourself before you call. (And the one that's almost always the answer.)

Your AC is humming, the fan is moving, but the air coming out is barely cool — or worse, room temperature. Before you spend $189 on a service call, walk through this list. Half the time it's something you can fix in 10 minutes.

Before you start: safety first

Two rules. One: turn the system OFF at the thermostat before doing anything outside the unit. Two: do not open any panel that requires tools — there are 240V circuits inside that will hurt you.

The 6-step diagnostic

1. Check the filter

This is the #1 cause of weak cooling, easily 60% of our "not cooling" calls. A filter that's gray or visibly clogged restricts airflow so badly the evaporator coil freezes solid. Symptoms: weak airflow, ice on the indoor unit's copper lines.

Fix: Replace the filter. If the coil is already iced, turn the system OFF, leave the fan ON for 4 hours to thaw, then restart with a clean filter.

2. Check the thermostat

Sounds dumb, but: is it set to "Cool" and not "Fan only"? Is the setpoint actually below room temperature? Is the battery dead (if it's battery-powered)?

Also: smart thermostats sometimes lose their schedule after a Wi-Fi outage. They'll show "Cool 72°" but actually be in "Hold" mode at 78°.

3. Check the outdoor unit

Walk outside. Is the big unit (condenser) running? You should hear a fan and a low compressor hum. Touch the side — it should be warm but not hot.

If it's not running: check the breaker panel — there's usually a dedicated double-pole breaker for the AC. Also check the disconnect box on the wall next to the unit (silver or gray box, sometimes pulled out as a service shutoff).

If only the fan is running but not the compressor: almost certainly a bad capacitor. ($249–449 for the part + service call.)

4. Check the outdoor coil

Look at the outdoor unit's fins (the radiator-like surfaces). Are they covered in cottonwood seeds, grass clippings, or pet hair? If yes, the coil can't reject heat and the system can't cool.

Fix: Turn the system OFF. Spray the outside of the fins with a garden hose from the inside out (top to bottom, gentle pressure). Don't bend the fins.

5. Check the indoor coil drain

Your indoor unit (in a closet, attic, or basement) has a drain pan and a PVC drain line. If it's clogged, the system shuts off cooling to prevent water damage but the fan keeps running.

Fix: Locate the drain line outlet (outside, usually a 3/4" PVC pipe near the foundation). Pour a cup of distilled vinegar in the access port near the unit (T-fitting with a screw cap on top of the line). If the line is fully blocked, you need a tech with a wet-vac.

6. Check vents and returns

Walk through the house. Are all the supply vents open? Are any return vents blocked by furniture, rugs, or curtains? A blocked return = restricted airflow = same symptoms as a dirty filter.

What if you've done all that and still no cool air?

Now it's almost certainly one of three things — none of them DIY:

IssueSymptomsTypical fix
Low refrigerant (leak)Warm air, hissing sound, ice on copper linesFind leak + repair + recharge: $400–1,200+
Failed compressorOutdoor unit hums but no cool air, frequent breaker trips$1,800–3,500 (often time to replace whole system)
Reversing valve stuck (heat pumps)System blows hot when set to cool (or vice versa)$450–800
⚠️
Don't keep running it. If you've worked through the checklist and the AC still isn't cooling after 30 minutes of runtime, turn it OFF. Continuing to run a system with low refrigerant or a failed component will compound damage — sometimes turning a $400 fix into a $3,500 replacement.

The "do I need a new system?" question

If your tech tells you the system needs a major repair (compressor, evaporator coil, refrigerant leak in inaccessible piping), here's the math:

  • System is <10 years old: Repair almost always wins. Modern systems are built for this.
  • System is 10–14 years old: Compare repair cost to replacement. If repair is >40% of replacement, replace.
  • System is 15+ years old: Replace, even if repair is "only" $800. You'll be back in two summers anyway, and you're paying R-22 prices for a system that's 30% less efficient than today's tech.
  • System uses R-22 refrigerant: Phased out in 2020. R-22 now costs $130/lb wholesale and a typical recharge needs 4–8 lbs. Replace.
❄️
Still not cooling? We can be there today.
90 minutes to your door across NJ, NATE-certified HVAC techs, full diagnostic with written report, no upsells. $89 service call (waived if you book the repair).
Book HVAC service →
Can I just add refrigerant myself?
No, and it's illegal in most cases — refrigerant handling requires EPA 608 certification. Also, simply adding refrigerant doesn't fix the leak that caused the loss. Within weeks you'll be in the same spot.
Why does my AC freeze up?
Three causes in order of frequency: dirty filter, low refrigerant, failing blower. Always check the filter first.
Should I cover my outdoor AC unit in winter?
No, despite what the internet says. Modern condensers are designed for outdoor exposure year-round. Covers trap moisture and create homes for rodents that chew wiring.
What's the lifespan of a residential AC in NJ?
12–18 years for a properly-maintained, properly-sized system. Northern NJ's climate is gentle on AC compared to the South — you have winter rest periods that let units recover.
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