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If Your Air Conditioner Fan Is Not Spinning, Use These Tips to Fix It

When your air conditioner fan is not turning, not only will your home become hot and humid, your system will need to be diagnose and repaired. Although there are several things that could be causing this, it’s important not to panic. If you’re inexperienced with this sort of thing, let the information below help you diagnose your air conditioner’s problem.

Check the power supply

One of the first things you want to do when your air conditioning fan isn’t spinning is to check the breaker to make sure it didn’t get tripped. If you do see that your breaker has been tripped, it’s best to call a trained professional to inspect your breaker box. Tripped breakers have been known to explode on an occasion, and it’s better to be safe than sorry.

In addition to checking the breaker box, you’ll also will want to listen to the control cabinet. If you hear a humming noise, that is not a good sign. A humming noise usually means that there’s not enough voltage being provided to power your air conditioning. When this happens, the problem could potentially be with either the wiring, the capacitor or even the motor. In this case, it’s best to either call a professional to take a look at your system.

Your capacitor could be the reason your air conditioner fan is not spinning

The purpose of a capacitor is to store energy that’s in return used to power your cooling system. The are a lot of things that can contribute to your capacitor breaking down on you, but once it does, your air conditioner fan will stop working. Unless you have experience repairing air conditioning systems, it’s best to hire a trained technician to fix this for you.

A burned-out motor might be causing your air condition fan to not work

Overtime, the motor in your air conditioner goes through the basic wear and tear and will eventually burn out. When this happens, your air conditioner fan will quit spinning. You have two options. You can either call and have a professional fix the motor or you can invest in a brand-new system. If your unit an older system, it might be time to start shopping.

Most air condition systems last anywhere from 10 or more years. However, if you perform regular maintenance, you can prevent the chance of your air conditioning fan breaking down and not spinning. This includes changing the filter at least once every two to three months and using a soft brush to clean the coils on the inside of your unit.

Contactor problems can result in your central air conditioner fan not working

If you’re unsure as to what your air conditioner’s contactor switch is, it’s a switch located on the inside of your unit that ensures that there is enough voltage being provided to control the compressor as well as the condenser fan motor. When this switch goes bad, your air conditioner’s fan will not spin. This is another issue that will need professional assistance unless you have experience repairing air conditioning systems.

If your air conditioner fan is not spinning, the problem could be a faulty belt

Another problem that may cause your air conditioner fan to not spin might be a belt that has either broken or became loose. Most of the air conditioning systems that use belts are outdated units. Replacing these your unit’s belt is not too hard, but when the belt does slip off or break, it usually means that your unit is getting old. You may want to think about replacing the whole system.

If you do decide to replace your air conditioner’s belt, you’ll want to look in the owner’s manual to be sure you get the right size. These belts can be purchased at most home improvement stores and are fairly easy to replace if you have the right tools.

A blocked air filter may be the culprit in why your air conditioning’s fan is not spinning

When your air conditioner’s filter is dirty, filthy and clogged, air flow can’t go through the filter and ice will begin to accumulate on it. As a result, this puts more stress on your unit’s fan as well as the other parts of the machine. In addition to this, some systems have a built-in feature that will automatically shutdown the fan when it detects that the filter is dirty or blocked.

If you are unsure as to what kind of filter your system requires, you have two options. You can either take your old filter to your local home improvement store or you can look in your owner’s manual. It’s also important to make sure that you get the right sized filter. A filter that’s not a proper fit can obstruct airflow and put more stress on your air condition fan. After an extended period of time, you fan can break or stop working.

When your air conditioner’s outside fan is not working, inspect the fan itself

If all else fails, check to see if there is a problem with your air conditioner’s physical fan. While inspecting the fan, first check the bearings. The bearing make it possible for the fan to spin. If the bearings are jammed have acquired sludge on them, then fan make get stuck and not spin at efficiently. This will in return will put more stress on the motor, which could also lead to the motor being burned out.

To resolve this issue, you will need to either call a professional unless you want to do it yourself. Unjamming and replacing the fan blades are a little more difficult that lubing up your bearings. To lube up your bearings, you’ll want to first start by shutting down the power. This includes unplugging your air conditioning and turning off the breaker that provides power to it. Once you have the power off, remove the panels and insert oil into the into the lubrication ports on the motor. Give the blades a spin. If all works well, put the panels back on, reconnect the power and start your air condition.

Michael Joseph


Thursday 20th of August 2020

My fan doesn't spin when I start the air conditioner up via the thermostat control but if i take a screwdriver and give the fan a push it start spinning. What's the problem and fix


Sunday 9th of June 2019

I turned on our a/c unit and the fan keeps shutting of on the unit outside. The unit is blowing cold air. What could the problem be?


Saturday 11th of May 2019

Hi Michael, what could be a cause for an outdoor fan that starts with the AC unit but stops after the unit has run awhile (maybe 20-25 minutes)? The fan is loose and not bound. The motor is only about 6 months old because I replaced it due to this issue, but the issue is still happening. Thanks for any tips on what to try, Gina

Karen C.

Wednesday 10th of July 2019

I am having the same problem. When fan stops spinning...Turn a/c unit off for a few minutes, then back on and fan spins for awhile.

Gene Phoenix

Monday 20th of May 2019

I got same problem !