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Most of the time, your heating and cooling system will operate with nothing more than a gentle hum. However, HVAC systems aren't meant to last forever, and one of the ways you can tell something may be wrong is by the sounds it produces. To ensure you catch a problem before your system breaks down completely, consider the information below. 

5 HVAC System Noises & Their Causes

1. Constant Clicking

You’ll typically hear clicking when the heating and cooling system turns on and off. However, if there is constant noise coming from the outside compressor or control panel, it could be from a defective relay, which will need repairs. 

2. Loud Banging & Rattling

If you hear something rattling when the system is on, it could be from a loose component. A qualified HVAC professional can identify the unsecured equipment and make repairs before it breaks off completely. Loud bangs, however, usually mean something has already become disconnected or broken, so it’s best to turn the system off and contact an expert for assistance. 

3. Knocking

heating and coolingWhen your furnace is on, you may hear sounds that resemble knocking. This typically doesn’t signify a major problem. Instead, it’s likely the result of an incorrectly installed vibration damper. 

4. Screaming

Sometimes air conditioners make a worrisome screaming noise. This sound usually indicates a hazardous refrigerant leak or high-pressure accumulation within the unit, which can cause a dangerous explosion. If you hear this noise coming from your air conditioning system, immediately shut it off and contact a heating and cooling expert.

5. Squealing

Squeals usually point to either a problem with the motor bearing or the belt. The belts aren’t expensive to replace, so you shouldn’t wait until they break completely before you make repairs. If this happens, your blower won’t move and your unit won’t operate. 

 

If your HVAC system is making unusual noises, reach out to the professionals at Custom Heating & Cooling in Mountain Home, AR. Their experienced contractors offer a wide range of services, including repair and maintenance for central air, HVAC systems, air compressors, and furnaces. They’re also one of the few companies in Baxter County that specializes in geothermal heating and cooling solutions. To learn more about their affordable HVAC options, visit them online or call (870) 425-9498 to schedule service today.

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