What is the Preventative Maintenance for ACs?

Preventative Maintenance

Air conditioners may require regular cleaning of the condenser air inlet section. Restriction to the flow of air over the condenser coil will degrade the performance of the equipment, cause it to overheat, reduce cooling and can damage the compressor. The overload switch in the compressor may cause the compressor to cycle if the condensing coil pressure becomes too high due to air restriction. A further safety feature is the refrigerant high pressure cut off switch which will stop the compressor if the condensing pressure becomes too high due restricted condenser air flow or some other cause.

Restricted air flow due to neglecting preventative maintenance will cause unit to repeatedly turn off and then turn back on after it cools off. An operation in this safety cycling mode will eventually damage the equipment and void the warranty.

Refer to Field Serviceable Parts section in this manual for details on parts that can be changed to help increase the uninterruptable life of the Air Conditioner.

Condenser and Evaporator Fans

Thermal Edge air conditioners use high efficiency, long life, sealed ball bearing fans engineered for optimum performance that require no maintenance. Keep fan blades clean for optimal performance. Fans are removable and attached by plug-in connections.


Thermal Edge uses hermetically factory sealed compressors that are quiet, low vibration and are maintenance free. Thermal overload devices are installed to protect the compressor from damage due to overheat and short cycle faults. If the compressor thermal overload fails, it is recommended to return the unit to Thermal Edge customer service for proper replacement. Note that the rotary compressor runs with compressed refrigerant gas on the outer case and therefore is hot to the touch.

Loss of Refrigerant

Thermal Edge air conditioners are meticulously leak and run tested after assembly. If a leak in the system should develop due to shipping damage or mechanical vibration, the leak must be detected, repaired and the refrigerant charge restored to the system by a qualified refrigeration professional.

Condenser Coils

Depending on the environment the condenser coils may become dirty and the air conditioner may lose efficiency, causing overheating and diminished cooling capacity. Dirty condensing coils must be backflush cleaned using proper commercial coils cleaning compounds and thorough back-flushing rinsing. Refer to directions on the cleaning compounds selected. Acid wash is not recommended as it reduces the life of the coil