5 Sounds You Shouldn’t Hear From Your AC

July 10, 2019

Air conditioning units, especially central AC systems, will make sounds from time to time. While some sounds are normal, such as the clicking you hear when the AC turns on and off, others signal a problem with the unit. Below are a few sounds that you don’t want to hear coming from your AC.

1. Rattling and Banging in Your AC

These both indicate a loose or broken part. It could be loose wiring or loose nuts and bolts. Banging shows that the problem is growing worse. The sounds could also point to failing motor bearings. Another possible cause of rattling is the presence of debris, such as leaves and twigs, in the system.

2. Grinding

In a worn-out compressor, the pistons may start to grind against each other. This is one of the most ominous sounds, so you would want to get professional help immediately. At Brennan Heating & Air Conditioning, we know that a compressor replacement is costly and that it may be better, at that point, to simply replace the AC unit entirely. We can handle new system installations throughout Seattle.

3. Buzzing and Continual Clicking

Both of these sounds can denote an electrical issue, which is why we place them together here. An AC unit that buzzes may not have tight electrical connections or may have bad circuit breakers. Constant clicking may be a sign of a defective relay or control.

4. Continual Squealing

A squealing sound upon start-up is not out of the ordinary. However, continual squealing may mean that either the indoor blower motor or outdoor fan motor is going bad. Motor bearings and blower motor belts that wear down can also produce a squealing or screeching sound.

5. Hissing

This almost always signifies a refrigerant leak: another issue that requires immediate attention.

Hiring an Experienced AC Technician

Since you want only experienced technicians to inspect your system and pinpoint the problem, choose Brennan Heating & Air Conditioning. We’ve been serving the area of Seattle and Lynnwood since 1987. Because of our dedication, we’ve won the Angie’s List Super Service Award for 12 years straight. Call us for an appointment. We also offer heating, electric, and water heater services, too.

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