Typical Problems with Heating and Air Conditioning Systems

GEO December 1

Most Common Problems with Heating and Air Conditioning Systems

Heating and air conditioning systems are typically very reliable. In fact, most HVAC systems will last a home for 10 to 20 years – as long as they are well-maintained. However, as with any household system, some problems could arise, which may require a replacement or professional repair.

Most of the time, a client will call their local HVAC repair service because they are not receiving hot or cold air. Sometimes, the system will not engage. Regardless, knowing the common issues is important so that a homeowner could prepare themselves for the repairs needed.

Blown Fuses

A fuse protects the unit’s compressor and motor from overheating. It is in the evaporator coil of the unit. The first thing a technician will check when the system is not operating properly is the fuse. This is a quick and easy fix but may indicate that there is a larger problem going on – especially if the fuse fails often.

Worn Contactor

An HVAC unit has three contractors. One is for the compressor unit, another works on the blower motor, and the last operates on the condenser. The contractors are what engage when there is a need to cool or heat the home from the HVAC. If there is an issue with the HVAC contractor, the unit may not work.

Refrigerant Leaks

Another common problem with heating and air conditioning systems are refrigerant leaks. “These can happen just from the vibrations of the unit while it is running, and the leak that hits the evaporator coils or condenser cannot be repaired. If the leak is found in another place, the technician may be able to recharge the system. However, a refrigerant leak often means that the unit has another problem and may require a more extensive repair.

Compressor Failure

The compressor is the heart of a home’s air conditioning unit. The compressor is alongside the condenser coil. If there is an undercharge, the compressor runs hot and stops. Sometimes the compressor can be repaired, while other times the HVAC system will require an entirely new compressor.

Wiring Problems

Haphazard or poorly created wiring for an HVAC system can lead to a catastrophic failure. Worse, this type of workmanship could also cause a household fire. Unfortunately, when a homeowner does not use a certified HVAC professional, or they attempt to install their HVAC on their own, wiring issues tend to occur.

Frozen Coils

Frozen coils happen when the unit is not receiving adequate airflow. Sometimes this is as simple as changing out a dirty air filter or removing an obstruction from the ductwork. Other times, it is the result of refrigerant leaks.

Clogged Drain Lines

Dirt or algae buildup might force the drain line to clog. Once the drain line plugs, the drain pan fills and water leaks over, leading to water damage. Sometimes the water damage is minimal, while other times the water damage requires an HVAC replacement.



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