The air handlers are the ones responsible for the smooth and efficient flow of air throughout the entire house. They work with your heating and cooling system to improve energy efficiency, improve indoor air quality and lower the risk of your AC deteriorating and therefore the need for AC repair in the future. In the unfortunate event that your air handler fails for a variety of reasons, you will need to call for a repair. You need to check your air handler to see if it has a filter, which protects the blower assembly from contaminants. It is very important that you change your air filters on a regular basis to ensure that your AC blower and air handler are able to continue operating as expected. There might be a leak in your condensate pan if your air handler is not working properly, so you may want to check your condensate pan for leaks. As a result of the hot weather, your AC unit will have to work hard, which will create a lot of condensation, which will accumulate in the pan beneath the air handler. Depending on how long the problem is left undisturbed, algae or mold could perhaps build up in the lines and clog the drains if left untreated. This could eventually cause the pan to overflow and damage the house. When this happens, it is best to contact an HVAC repair professional as soon as possible. There are several factors which may cause the blower motor to fail, such as a bad relay, a bad run capacitor or a malfunctioning control board. Occasionally, the blower itself may be the cause of the failure. The best thing you can do to resolve this issue is to call a professional who can determine the cause of the problem and provide you with a replacement part if necessary.