Hours: Monday-Friday, 8am-5pm

2930 Broadway St. Suite A, Eureka, CA 95501



There are some noises that you normally would expect to hear when your air conditioning is running. However, if you hear any of the following four sounds, it is time to hire a professional AC repair service.


If you hear a squealing sound coming from your indoor AC unit, it could be its fan belt. This is a common problem that is caused when the belt becomes worn or is misaligned. The sound could be intermittent or more noticeable when temperatures or humidity levels change, which causes the belt to expand or contract. You can continue using your cooling system, but you should schedule a repair because the belt will eventually break.

High-Pitched Scream or Hiss

If you hear a high-pitched scream or hiss coming from your AC’s condenser outdoors, it could be that pressure has built up in the compressor. Your air conditioner may turn itself on and off frequently. In this case, you should turn off your system and schedule a repair because this could be a dangerous condition.

Clanking or Banging

If you hear clanking or banging noises coming from your outdoor unit, it could be as simple as a small tree branch having fallen into the cabinet. Or, it might mean that the fan is wobbling because it is loose and hitting the sides of the cabinet. If there is a stick, you may be able to remove it on your own after you turn off the power to your unit. You will need to call in a professional if it is your fan that needs to be repaired, though.


A screeching metal-on-metal sound that starts when your air conditioner turns on could be a sign that the fan’s motor bearings are wearing out. You should get professional help as soon as possible because this could cause your fan’s motor to seize.

Reliable AC Repair

Do not ignore strange noises coming from your air conditioning system. Contact Evans Mechanical to schedule your repair service today. We have been providing reliable heating and cooling repairs, maintenance, installations, and indoor air quality solutions for more than 25 years to residents of Eureka, CA, and the surrounding areas.

What our customers are saying
Five-Star Customer Reviews

Everything was super professional. They showed up on time.kept me informed of what they were going to do and finished ahead of schedule. Work was impeccable! Highly recommended!

Martin R.

We are always happy with the service from Evans. Your service people are always friendly and professional. And we feel your prices are fair and that you do an excellent job of keeping our heating system in working order. We are glad you are in Humboldt County.

Kimberly T.

All three technicians worked well together. They treated each other kindly and were thoughtful and courteous with me. They did a final and complete cleanup after the installment of my new heater. They were respectful of my home. I’m grateful I used this company.

Kathy T.

Evans Mechanical is an excellent service committed to customer satisfaction and guaranteed quality workmanship. Our water heater burst and they were very responsive. They sent a technician out the same day and it was determined the heater was beyond repair.

Matthew H.

Excellent service from start to finish. Joe came out to give us an estimate on what we would need for a new furnace, never pressured us to buy the top of their line just giving us options on what we would need for our home. Then the date set for installation Thomas and Ryan came out on time and did a great job.

Kathi J.

The installers are finishing up. We expect to have great results with the new furnace & the newly installed dehumidifier. We applaud the professionalism of the installers.

Shutterbug S.