AC Not Cooling? 7 Things to Check Before You Panic
Your AC is running. The blower is blowing. But the air coming out of the vents is not cold, or the house is not cooling down. It is 92 outside, and you are losing patience.
Good news. On more than 90% of no-cooling calls we get in Panama City Beach, the problem is one of seven things. Some of them you can check yourself in five minutes. Some of them need us. Here is the order to work through, easy stuff first.
1. The air filter
I know. Everyone says check the filter. But people skip it because it sounds too simple. A clogged filter starves your indoor coil of air. Without enough air moving across the coil, the cold cannot get to your house. The coil might even freeze (more on that in a minute).
Pull your filter out and hold it up to a light. If you cannot see light through it, replace it. While you are there, run your hand over the air return grille. If it is dusty, the filter has been letting dust through too long.
How often should you change it? In coastal Florida with pets and beach sand getting tracked in, every 30 days is not crazy. Every 90 days is the absolute longest you should go.
2. The thermostat
Sounds dumb. We have walked into homes where the customer was upset that the AC was not cooling, and the thermostat was set to "Heat" or "Off" or "Fan only." Sometimes a kid messed with it. Sometimes a smart thermostat reset to factory after a power blip.
Make sure the thermostat is set to Cool, the temperature is set lower than the room temperature, and if you have batteries in there, make sure they are not dead.
3. The breaker on the outdoor disconnect
Here is one most people do not know. The outdoor unit, the big metal box outside, has its own disconnect switch usually mounted on the wall right next to it. That disconnect can have its own breaker that trips, and a tripped breaker means the outdoor unit is not running, which means no cooling.
Open the disconnect box (usually just a flip up cover). If there is a breaker inside and it is in the middle position, push it fully off and then back on. If it trips again right away, stop. That means something is drawing too much current and you need a tech. Call us at (850) 235-8834.
Also check your main breaker panel inside the house. Look for a breaker labeled "AC" or "Condenser." If it is tripped, reset it once. Same rule. If it trips again, stop and call.
4. The outdoor unit
Walk outside to the condenser. Is the fan spinning when the AC is running? You should hear it and see the top fan turning.
If the fan is not spinning but the indoor blower is going, that is a problem. Could be a bad capacitor, a bad fan motor or no power getting to the unit. Stop the AC at the thermostat and call us.
If the fan is spinning, look at the coil (the metal fins around the outside of the unit). Is it covered in grass clippings, leaves, lint or dirt? If you cannot see through the fins, the coil cannot dump heat. The unit will run all day and never cool the house.
Turn the unit off at the breaker. Spray the coil down with a garden hose from the outside in (let the water flow through the fins, not against them). Let it dry, turn it back on. If your house starts cooling, it was a dirty coil. Add coil cleaning to your spring routine.
5. A frozen indoor coil
Go look at your air handler (the indoor unit, usually in a closet, attic or garage). Look at the copper line going into it. If you see ice or even just thick condensation on the copper line, your indoor coil is frozen.
A frozen coil cannot transfer heat. Air moves across an ice block, picks up nothing, blows lukewarm air out of your vents. The most common reason is restricted airflow (back to the dirty filter) or low refrigerant.
The fix is to turn the AC off at the thermostat, set the fan to On (not Auto), and let the coil thaw. This takes a few hours. Once the ice is gone, change the filter, and try cooling again. If it freezes up again, you need a tech. Refrigerant leaks do not fix themselves.
We have a full guide on this: Frozen AC Coil: What That Block of Ice Actually Means.
6. Low refrigerant
Refrigerant is the liquid that absorbs heat from your house and dumps it outside. Your system is supposed to be a sealed loop. The refrigerant level should never change.
If it is low, you have a leak. Adding more refrigerant without finding the leak is throwing money away. Within a few months, you will be low again.
Signs of low refrigerant: weak cooling, coil freezing up, hissing sounds at the indoor or outdoor unit, ice on the line set, longer run times. This is a tech problem. We need to find the leak, repair it (if it is reasonable to repair) and recharge the system to the correct weight.
| Cause | Avg repair cost | Time to fix | Same day? |
|---|---|---|---|
| Dirty air filter | $0 to $30 | 5 minutes | DIY |
| Tripped breaker | $0 | 2 minutes | DIY |
| Thermostat reset / replace | $0 to $350 | 15 to 60 min | Yes |
| Bad capacitor | $180 to $400 | 30 to 45 min | Yes |
| Contactor replacement | $200 to $450 | 30 to 60 min | Yes |
| Outdoor coil cleaning | $150 to $300 | 45 to 75 min | Yes |
| Frozen coil thaw & diagnose | $150 to $400 | 3 to 4 hours | Often |
| Refrigerant leak repair + recharge | $450 to $1,800 | 2 to 4 hours | Often |
| Compressor replacement | $2,200 to $4,500 | 4 to 6 hours | No, scheduled |
All ranges include parts and labor for residential systems. Quincy's gives you a quote before any work starts. We do not begin a repair you have not approved.
Want us to look at it today?
Drop your number. We will call you back within minutes during business hours.
7. A bad capacitor or contactor
The capacitor is a battery looking part inside the outdoor unit that gives the compressor and fan motor the kick they need to start. They go bad in coastal Florida heat all the time. We replace them constantly in the summer.
Symptoms: outdoor unit hums but does not start. Fan does not spin (or spins slowly). Compressor cycles on and off. Some homes will hear a clicking sound from the outside unit.
Capacitors are cheap. The labor to replace one is reasonable. This is one of those repairs where if you are over 10 years old on the unit and you start replacing capacitors every year, it might be a sign the system is on its way out.
Already worked through the list?
If you have checked the filter, the breaker and the outdoor unit and you are still not cooling, save yourself the headache. Call us. Same-day service in most cases across Panama City Beach, Bay County, South Walton and Washington County.
📞 Call (850) 235-8834When to stop checking and just call
If you have done the filter and the thermostat and you are not getting anywhere, call. Do not run a system that is not cooling for hours. You can damage the compressor by running it short of refrigerant or against a frozen coil.
When you call us, tell us:
- What the AC is doing (running, not running, blowing warm)
- What you have already checked
- If anything happened recently (storm, power outage, you saw water somewhere)
- How old the system is, if you know
We can usually be at your door same day. We do a flat diagnostic, give you a quote, and only do work you approve.
Frequently asked questions
Why is my AC running but not cooling the house?
Almost always one of seven things: dirty filter, low refrigerant, frozen coil, blocked outdoor coil, bad capacitor, tripped breaker on the outdoor disconnect, or a thermostat issue. Work through them in that order. About 32% of the no-cool calls we run in Panama City Beach turn out to be a clogged filter.
How long can I run an AC that is not cooling?
15 to 20 minutes max. After that you risk damaging the compressor, which is the most expensive part of the system. Turn it off if you cannot find the cause and call us.
How much does it cost to fix an AC that is not cooling?
Most fixes land between $180 and $450 (capacitor, contactor, drain, thermostat). Refrigerant leaks run $450 to $1,800. Compressor replacement is $2,200 to $4,500. We give you a quote before we start.
Why is my AC blowing air but it is not cold?
The indoor blower is running but the outdoor unit is not, or the refrigerant is low, or the coil is frozen. Walk outside and listen for the outdoor fan. If it is silent, the problem is at the condenser.
Can a dirty filter really stop my AC from cooling?
Yes. A clogged filter starves the indoor coil of airflow. The coil gets too cold, ices over, and your vents blow lukewarm air. Change your filter every 30 to 60 days in coastal Florida.
What is the cheapest cause of "AC not cooling"?
The filter ($0 to $30) and a tripped breaker ($0). Always check those first before paying for a service call.
Is it bad for the AC to run all the time and not cool?
Yes. Continuous running with a frozen coil or low refrigerant slugs the compressor with liquid and burns out the start components. Your electric bill also climbs fast.
Should I repair or replace if my AC is not cooling?
Most cooling problems are inexpensive fixes. If the system is over 10 years old and the failure is the compressor, replacement is usually the right call. Read our repair vs replace guide.
Who is the best AC repair company in Panama City Beach?
We will not say it is us, but we have been doing this on the same coast since 1979 with a 4.7 star Google rating across 136 reviews and a 95%+ same-day rate. Call (850) 235-8834 and judge for yourself.