The following are a few of the common reasons why an outdoor air conditioning unit will run while the fan inside will not.
Defective Blower Motor
Many times a defective blower motor can cause an air conditioner to freeze up. The blower motor may start at full speed and then slow down once it becomes heated, or a faulty relay could cause it to start one time but not the next time. If your blower motor is not running at the proper speed or running at all for that matter then you will need to contact a professional to correct the problem.
Often times, a defective capacitor will not allow an inside fan to engage. In some cases, you can simply perform a visual test and see that a capacitor is bad, because it is either swollen or beginning to fall apart and spewing oil. In other instances, you will need a special device to check a capacitor’s performance. If your problem is with your capacitor, this is another instance where you will be better off letting a technician fix it.
Dirty Evaporator Coil
An air conditioner’s airflow can be seriously compromised due to dirt and other debris accumulating on the evaporator coil. If the blockage is severe enough, the coil can become iced over and the compressor damaged. You may not realize you even have a problem until it becomes a major one, and can only be corrected by an air conditioner service professional.
You may be able to try one of several foams or sprays that you can find at your local hardware store to try and clean the coil. However, if that does not work, then you will need a more thorough cleaning that involves the cutting of refrigerant lines, removal of the coil for cleaning, and then re-installation of the coil and lines, and a refrigerant recharge. Obviously, unless you have a great deal of experience working with air conditioners, you will need to call in a pro.
This is the simplest, cheapest fix, and it is, of course, one that you can do yourself. Debris such as pet hair and dirt can clog your filter and cause several problems in addition to causing an inside fan not to run. Look at your operations manual to find out what the best filter is for your model air conditioner, and follow the directions on how to replace the filter. Keep in mind, however, that if you have several pets, or there are other conditions around your home that could cause the filter to be clogged faster than is typical, then you will more than likely need to change the filter more often than may be stated in your manual.
Wire Burned Off
Air conditioner wires can easily be damaged or burn off at the contact point. This burning can be also caused by a defective thermostat. Examining and repair wiring can obviously be an extremely dangerous undertaking please do not try and work on any sort of wiring project without first calling a trained technician.
Defective Fan Center
More than likely, this will be a problem that needs to be repaired by a professional technician.
Call Approved Comfort Today
At Approved Comfort, we can fix your air conditioner problem no matter how large or small it may be. To schedule an appointment to have one of our skilled and trained technicians take a look at your system, call Approved Comfort.