Air conditioners fail from time to time. Whether your AC is making noise, doesn’t cool your home or just doesn’t come on, we’ve listed some possible reasons why and what you can do about them.
AC Unit is Making Noise
Most air conditioners make some noise when they are running, and this is normal. If you hear vibrations or loud rattling noises, something could be wrong. Your ac unit could have been installed incorrectly and should be checked by a professional.
Sometimes people report squealing sounds when their air conditioner is running. This may actually be coming from your air handler, the part of the ac system that regulates and directs air through the ductwork. Most air handlers have direct-drive motors, but older units may be belt-driven. The squealing noise sometimes occurs when the belt connecting the blower to the motor slips. If you suspect this is the case, shut your ac unit off and call a professional – proper diagnosis and repairs are likely needed.
AC Runs, But Doesn’t Cool Your Home
If air is flowing through your vents, but it is not coming out cold, you might have a stalled condenser coil – the part of the air conditioning unit that produces cold air. The condenser fan will run even if the condenser isn’t working properly. Condenser failure can be caused by a blown fuse or tripped circuit breaker. Sometimes a lack of cooling can also be due to low refrigerant. In either case it is best to contact a professional to help you diagnose the problem.
AC Unit Won’t Come On
Sometimes mysteriously, an air conditioning unit won’t come on, but the fan inside the home seems to be working OK. There can be several reasons for this. The first thing to check is your thermostat to make sure it is working properly. A broken thermostat can easily disable an entire AC system.
If you are able to rule out the thermostat as the problem, check your home’s circuit breaker and the circuit breaker outside near the unit. If you suspect it may be the breaker, it doesn’t hurt to try to figure out what might have caused it to trip before you attempt to reset it. If you flip the breaker and it does trip again, don’t repeat the process. If this isn’t working to remedy the situation, call a professional.
Anytime your AC fails or you suspect something is mechanically wrong, contact a professional to help you diagnose the problem. At Nicholson Plumbing, Heating & Air Conditioning, we recommend regular maintenance to keep your unit running smoothly.
Francis from Nicholson Plumbing and Heating was excellent. He was here to evaluate HVAC in our home. He was very patient and answered all my questions. He is also polite and easy to communicate with him. He explained technical concepts to me in layperson terms!
- Shelley S.
Nicholson offered what is possibly the best customer service I have dealt with in a home repair situation. I called them because I was looking to replace my very old furnace. They came out to do an initial estimate, and then came back when I had some further questions about my options. After installing the furnace, they ran into some problems with my air ducts. This happened on a Friday, and the problem was fixed by Monday afternoon. In addition to their excellent service, they did quality work at a fair price. I would recommend them to anyone looking for an HVAC company in the Framingham area!
- Melissa T.
Recently used these guys because my HVAC unit AC wasn’t working (first hot day of summer). Showed up on time, wore booties, fixed the unit. During the visit we talked about how my unit was having problems in the winter – which was resulting in NSTAR service calls of maybe 3-4 times per season (I am on a service plan with them). He was the first guy to tell me WHY the problem was happening, and HOW to fix it. I find it strange that all of the NSTAR guys etc. no one took time to point out how to fix the source of the problem…Very professional, smart. I would use them again, and plan to for the fix on my heating unit!
- Ben J.
Nicholson Plumbing, Heating and Air Conditioning is the best and most reliable source for electrical service. We are proud to be Mitsubishi Electric Diamond Elite Contractors, that have gone through extensive accreditation and training in order to provide proven high-quality service. Get in touch with us whenever you need to have electrical work done in Framingham!