Your heating and cooling system involves a few different fans that ensure the cooling process completes efficiently and correctly. Fans in both the outside air conditioning condensing unit and the inside furnace air handler are necessary to keep the system in its delicate balance. A problem with one of the fans can leave you with a system that doesn't function as efficiently – or doesn't provide cold or heated air at all.

Here are a few different fan issues that can thwart your HVAC system – and how a heating and cooling services company can help fix the problem.

Condensing Unit Fan: System Overheats and Shuts Down

The condensing unit contains a motorized blower fan that points at the condenser coils that line the interior wall of the unit. When you press your thermostat, an electric signal goes to a compressor in the condensing unit. The compressor pumps out a supply of gas refrigerant straight into the condenser coils. The condenser coils are designed to chemically change that gas into a fluid in a process that causes the surface of the coils to become warm.

The blower fan is designed to ensure the condenser coils don't become overly hot during the conversion process. If the fan becomes less efficient or stop working, the coils will overheat and trigger a safety sensor in the condensing unit. The condensing unit will then shut off to protect itself from heat damage or burnout. And the unit will shut off well before your home is adequately cooled.

If your system starts turning off suddenly and unexpectedly, call in an air conditioning services company to ensure that there is no problem with the fan that could be causing the coils to overheat.

Air Handler Blower Fan: No Hot or Cold Air Circulates

The air handler works as part of both the air conditioning unit and the furnace. A blower fan inside the furnace ensures that air circulates through the system to pass over either cooled evaporator coils, for the air conditioner, or a warmed heat exchanger or burner system, for the furnace.

If the air handler blower fan breaks or slows down, you won't have circulating air that can pass back out into your house to change the temperature. The rest of the unit could operate perfectly but without a way to actually pass air through and out of the system, the other operating parts won't be of much help. For assistance, talk to a professional like Nebraska Heating & Air.

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