24/7 AC Emergency Service Across Southeast Michigan
(844) 279-HVAC
Frozen AC condenser unit with ice on copper refrigerant lines outside a Metro Detroit home
AC Repair Frozen AC Coil
Don't Run a Frozen AC

Ice on Your AC? Here's What to Do Right Now.

A frozen coil isn't just a "weird AC" problem — every minute it runs frozen, the compressor takes damage. Walk through the 5-step recovery plan below. We'll get you cool again the same day.

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Recovery Plan

The 5 Steps to Thaw Your AC

Every step matters. Skip one and you risk damaging the compressor or sealing in moisture that'll freeze right back up.

1
Now
Urgent — Do This First

Shut the AC Off at the Thermostat

Set the system mode to OFF. Don't just raise the temperature setting — the compressor will keep cycling. Every minute it runs while frozen, it strains the compressor and can crack internal valves.

2
+ 1 min
Help It Thaw

Switch the Fan to "ON"

On most thermostats: System OFF, Fan ON. This circulates room-temperature air across the frozen indoor coil and speeds up thawing dramatically — usually cutting wait time in half. Don't set the system to Heat. That can crack the coil from thermal shock.

3
2–3 Hrs
Wait It Out

Let the Ice Fully Melt

This is the part everyone wants to skip. Don't. Surface ice melts fast but the ice deeper in the coil takes time. You'll know it's done when water stops dripping from the condensate drain line. Place a towel under the indoor unit — melting frozen coils can drip a surprising amount.

4
After Thaw
Find the Cause

Check Three Things

Filter: If it's grey, dusty, or you can't remember the last swap — replace it. Vents & registers: walk the house and make sure none are blocked by furniture, drapes, or rugs. Indoor unit: any blockage around it (boxes, laundry baskets) means the coil can't pull enough air. 70% of frozen coils are airflow problems.

5
If it Re-freezes
Call Us

Don't Keep Trying to Run It

If your AC freezes again within 24 hours of a thaw + filter swap, the problem isn't airflow — it's likely a refrigerant leak or mechanical failure. Both require a tech with proper tools and EPA certification. Running a system that's leaking refrigerant kills the compressor. Call us before it gets there.

Call (844) 279-HVAC
NEXT Heating and Cooling technician servicing an outdoor AC condenser unit at a Metro Detroit home with the red NEXT service van in the background
Or Skip All This

Don't Want to Deal With Any of It?

Filter swaps, coil cleanings, refrigerant checks, knowing when to panic and when not to — it's a lot for one homeowner to track. The NEXT Care Plan hands all of it to us. Twice a year we show up, tune everything, catch the problems early, and you never see another frozen coil. $5/month. Cancel anytime.

2 yearly tune-ups
Priority scheduling
10% off all repairs
No service call fees
Try the Care Plan — $5/mo
Why It Happened

The 3 Real Causes of a Frozen Coil

Frozen coils are caused by something specific — not bad luck. Here's how the calls break down across our service area.

Restricted Airflow

Dirty filter, blocked vents, dirty coil, or a too-small return duct. The coil gets colder than it should because not enough warm air is moving over it — and that's how ice forms.

~70%

Low Refrigerant (Leak)

When refrigerant pressure drops, the coil temperature drops below freezing. Refrigerant doesn't get used up — if it's low, you have a leak. EPA-certified work only. Refilling without finding the leak just buys you a few weeks.

~25%

Mechanical Failure

Failing blower fan, bad thermostat, stuck reversing valve. Less common but more serious. These require diagnostic tools to identify and almost always need parts replaced.

~5%
Critical — Don't Do This

4 Things That Make Frozen Coils Worse

Well-meaning shortcuts that turn a $200 fix into a $2,000 one.

Don't Pour Hot Water On It

Thermal shock can crack the aluminum coil. A cracked coil is a refrigerant leak waiting to happen and a major repair.

Don't Scrape the Ice

Coil fins are paper-thin aluminum — a screwdriver or knife will puncture the refrigerant tubing underneath. That's a complete coil replacement.

Don't Use a Hair Dryer

Too localized and too hot. Damages plastic drain pans, can melt insulation, and risks an electrical fault if water meets heat in the wrong spot.

Don't Restart Right After Thaw

Water needs to fully drain first. Restarting too soon traps moisture in the system, which freezes again on the next cycle. Wait the full 2–3 hours.

When We Come Out

What We'll Check on a Frozen-Coil Call

No diagnostic guesswork. We run through this checklist on every freeze-up call.

Filter conditionInspect, document, replace if needed
Refrigerant pressureMeasure with manifold gauges — this is the leak test
Indoor coil cleanlinessA coated coil insulates and freezes faster
Blower motor performanceAmp draw, RPM, belt condition
Return duct sizing & restrictionsUndersized returns are a hidden cause
Condensate drainClogged drain backs up moisture, freezes again
Thermostat calibrationWrong sensing = wrong cycle behavior
System temperature differentialConfirms the actual cooling performance after fix
Honest Pricing

We Quote Repairs On-Site

A clogged filter and a leaking refrigerant coil both cause the same frozen-coil symptom. The fix for one is a $30 swap. The fix for the other is a real repair. That's why we come out, run a real diagnostic, and quote you face-to-face. No phone-quoted bait-and-switches.

Free in-home estimates on new systems
Up-front pricing — no work without approval
Care Plan: 10% off repairs + no service call fees
Get a Real Quote — Call Now
Prevent the Next One

Frozen Coils Are Almost Always Preventable

Our $5/mo NEXT Care Plan includes a spring AC tune-up where we clean the coil, check refrigerant pressure, and inspect airflow — the three things that cause 95% of freeze-ups. Plus 10% off repairs and no service call fees if anything does go wrong.

Learn About the Care Plan
Local Coverage

Frozen AC Repair Across Southeast Michigan

Same-day service from a local crew that actually lives in the neighborhoods we serve.

Macomb County

Our home base. Mount Clemens, Sterling Heights, Warren, Clinton Township, Roseville, Chesterfield, Shelby Township, Macomb, St. Clair Shores, Eastpointe.

Average response: same-day

Oakland County

Full coverage west to Pontiac. Royal Oak, Birmingham, Bloomfield Hills, Rochester Hills, Troy, Madison Heights, Ferndale, Lake Orion, Auburn Hills, Beverly Hills, Southfield, South Lyon.

Average response: same-day to next-day

St. Clair County

North Macomb to the lake. Port Huron, Marysville, St. Clair, Algonac, Marine City, Yale, Capac, and the surrounding river communities.

Average response: next-day

Not sure if we cover your area? Just call (844) 279-HVAC — if we don't service your zip code, we'll point you to someone who does.

Related Symptoms

Other Things Your AC Might Be Doing

Frozen coils don't always show up on their own — click any of these related symptoms to diagnose.

AC Blowing Warm Air

Vents running but air isn't cold? Six common causes.

Diagnose
AC Making Noise

Banging, hissing, screeching — each sound means something different.

Diagnose
No Air Flow

Vents barely producing air? Restricted airflow causes frozen coils.

Diagnose
Low Refrigerant

The #2 cause of frozen coils. EPA-certified work only.

Diagnose
AC Turning On & Off

Short-cycling burns out compressors. Don't ignore it.

Diagnose
Fan Not Spinning

Outdoor fan stopped? It's usually the capacitor.

Diagnose
Thermostat Issues

Sometimes the AC is fine and the thermostat is the problem.

Diagnose
All AC Repair

Back to the main AC repair page.

View All
From the Blog

More HVAC Tips for Michigan Homeowners

Real advice from our technicians — what to watch for, when to call, and how to keep your bills in check.

FAQ

Frozen Coil Questions

2 to 3 hours with the fan running ("Fan ON, System OFF" on the thermostat). Without the fan, expect 4 to 8 hours. The deeper ice in the coil takes longer than the surface frost. You'll know it's done when water stops dripping from the condensate drain line.
Sometimes. If the cause was a clogged filter and you swap the filter during the thaw, the system may run normally afterward. But if the cause was low refrigerant, mechanical failure, or a dirty coil, it'll freeze right back up. If it freezes twice, stop running it and call a tech.
No. Running a frozen AC stresses the compressor, which is the most expensive part of the system. A 30-minute run on a frozen coil can shave years off the compressor's life or, worst case, total it. Shut it off, let it thaw, find the cause.
Yes. Most homeowners are shocked by this. The evaporator coil needs warm room air constantly flowing across it. A clogged filter chokes off that airflow, the coil temperature drops below freezing, and condensation on the coil turns into ice. It's the #1 cause we see across Mount Clemens, Sterling Heights, and Royal Oak service calls.
Because the leak is still there. Refrigerant doesn't get used up — if your system is low, refrigerant is escaping somewhere. Topping off without finding and repairing the leak is just buying you a few weeks. The repair is to find the leak (we use electronic leak detectors), fix it, then properly evacuate and recharge the system.
Three things, in order: (1) Change the filter every 1–3 months during cooling season. (2) Don't block return-air vents with furniture, drapes, or rugs. (3) Get an annual tune-up — that's the spring AC clean & check we include in the NEXT Care Plan. Coil cleaning, refrigerant pressure check, and airflow inspection prevent 95% of freeze-ups.
Yes — full coverage across Macomb County (Mount Clemens, Sterling Heights, Warren, Clinton Township, Chesterfield, Shelby Township, Roseville, St. Clair Shores), Oakland County (Royal Oak, Birmingham, Rochester Hills, Troy, Bloomfield Hills, Lake Orion), and St. Clair County (Port Huron, Marysville). Care Plan members go to the front of the line.

Don't Wait It Out.

Once it's thawed, you've got hours before it freezes again. We'll find the actual cause and fix it the same day — before your compressor pays the price.

Call (844) 279-HVAC
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Next Heating & Cooling

Licensed AC repair, installation, and maintenance across Macomb, Oakland, and St. Clair Counties. Same-day service plus our $5/mo NEXT Care Plan.

233 Church St
Mount Clemens, MI 48043
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