After the temperature drops, yet again, you begrudgingly walk over to the thermostat to crank up the heat. But wait… what’s that noise? With today’s HVAC units being quieter than ever, you shouldn’t be hearing strange or unusual noises from your unit. But if you are, that’s a sure sign that something isn’t right. So to help you identify the source of the strange sound coming from your unit, this article is going to cover the causes of a few common noises.
Clicking: When you turn your unit on or off, it’s normal to hear some clicking noises. However, constant clicking sounds are not normal. If you’re hearing clicking sounds, it could be a sign of a defective control or a failing thermostat. Because there are numerous electrical elements of an HVAC unit, it’s important to call for heating and cooling services sooner rather than later to avoid further issues.
Clunking/Banging: If you’re hearing banging or clunking sounds coming from your unit, there’s most likely a loose or broken part. Common parts that come loose may include a connecting rod, piston pin, or crankshaft. Another common cause of these noises is an unbalanced indoor blower or outdoor fan. While these issues are generally an easy fix, if they are ignored they can quickly lead to bigger problems.
Squealing: Outdoor fan and indoor blower motors tend to make squealing noises when they’re going bad. Additionally, squealing noises may indicate a bad belt or other motor bearing problems. While these are not expensive repairs, necessary heating and cooling services should be done before the belt or motor breaks, causing the unit to stop running.
Rattling: A loud rattling noise could mean a few different things. One cause of these sounds is that the air conditioner is beginning to deteriorate, leading to some of the parts coming loose. Loose hardware or a failing motor will cause loud noises and should be fixed as soon as possible. Another common cause of these noises is debris, like twigs, have managed to get inside the system. Because of the dangers of loose parts or a failing motor, it’s important to have a professional look at the unit as soon as the noises begin.
While there is a wide variety of noises an HVAC system can make, it’s important to better be safe than sorry. HVAC repair is important to keep the unit running efficiently. However, older units making noises may be better off replaced. Not only will a new air conditioner run quietly and efficiently, but replacing a unit older than 10 years may help homeowners save 20% on energy costs. So if you hear any sort of weird noises coming from your unit, don’t panic. Professional heating and cooling services will have your unit running quietly again and even better than before.