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A/c And Heat Pump Coil Troubleshooting

Here are a few potential issues that could cause your cooling or evaporator coil to stop working properly, and what you can do to troubleshoot and fix the problem.

Your HVAC system performs a vital job during nearly every season; it keeps your home at a comfortable temperature. But since the system is usually out of sight, you may not give it much thought – until it stops working. If the performance of your air conditioner, heat pump or air handler is declining, it could be related to the coil that houses refrigerant in each unit.

Air conditioning, heat pump and air handler coil troubleshooting

You should have a Trane Comfort Specialist examine your air conditioner, heat pump or air handler at least once a year. A certified comfort specialist will follow a maintenance checklist to einsure the health of your unit's coils. Your Trane technician will look for the following:

Dirty cooling coils

Debris can easily stick to and clog the inlet side of the cooling coil in your unit. This usually occurs when no air filter was installed in the system. Ordinary house dust and other debris such as soot and organic particles like pollen and mold spores all join to form a gray mat on the fins of the cooling coil in an air handler. If you see build up on your unit's coil fins, we recommend you contact Comfort Specialist to perform a routine cleaning.

Ice or frost formation

A coil will not operate properly and will lose cooling capacity if the coil becomes blocked with frost or ice. In normal operation air movement across the evaporator coil provides enough warmth that frost or ice does not form. However, if refrigerant gets on a coil over which air is not being blown, frost formation can quickly form on the surface. If you see frost or ice formation, a certified technician is need to properly fix the issue.

Damaged coil fins

Small areas of damaged coil fins can be straightened and cleaned using a cooling coil comb. However, if more than 10% of fins on the coils surface are damaged, the coils will need to be replaced.

Refrigerant leaks

Refrigerant leaks are a common occurrence and can happen for several reasons including: refrigerant lines rubbing together, ice pick damage or corrosion at the condensing or evaporator coil. If you suspect that your unit has a refrigerant leak, look for stains on piping or controls. A certified Trane Comfort Specialist can easily identify the origin of the leak and repair the problem.

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