HVAC DIY Tips & Tricks

Why You Should Clean Your Evaporator Coil

stay comfortable with phyxter home services

- By Russell Jones

Can't afford to replace your evaporator coil? Keeping your evaporator coil clean can help it last longer and prevent costly repairs. Learn why regular cleaning is so important, and find out the best techniques for doing it.

Importance of Evap Coils

Your AC evaporator coil’s primary function is to capture the heat from the air inside your home and transfer it outside via the condenser coil.

Outdoor Condenser Coil

Condenser coils (also known as fan coils) work by releasing the trapped heat into the air outside. A Heat Pump also works the same in summer.

Where is the Coil Located?

The evaporator coil is situated inside the home, in the indoor air handler unit or the ductless head unit. The condenser coil is located in the system’s outdoor unit.

Coil Performance

Performance is reduced when you have dirty coils. Evap coils get damp during the dehumidification process, so dust and debris stick to it

Cleaning: Use A Brush

A brush in conjunction with a vacuum can effectively remove at removing light amounts of dirt from a dirty coil. With a brush, you can be more in control of the pressure you use.

Use Compressed Air

If the buildup on the coil is not that heavy, using compressed air will work. Stay safe and wear safety glasses and a mask when using compressed air.

Use Commercial Cleaners

Once you have chosen a brand, follow the instructions provided by the manufacturer. Also, allow the cleaner to sit and foam until the debris and the foam is drained away.

Use Water and Detergent

Don't like chemicals? Try detergent. Spray the solution onto the evaporator coils and give it a few minutes to soak in so it loosens the debris and dirt.

Heavy Duty Cleaning

Heavy-duty cleaning can involve coil removal, cutting refrigerant lines, and reassembling everything afterward. This is best left to the professionals.

PRO TIP: Be Careful!

The wrong technique or heavy pressure can damage the fins on the coil. These are essential in the heat transfer process. Damage these and say goodbye to your coil.

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