When your heat pump suddenly becomes noisy, the first thing that may come to your mind is that it's about to break down. But don't panic just yet. Loud heat pumps could be just that — loud. At times, the loud noise could be a sign of a problem. So how can you tell the difference? Read on to find out the common noises that heat pumps make and what they indicate.
Normal Noises
Heat pumps usually make some strange sounds while they operate. For instance, those that have a Scroll-type compressor make clicking and tapping sounds as they shut down. When coming on, they make rickety sounds. Swooshing sounds are also to be expected when heat pumps go into defrost mode. Shifting valves are responsible for the sounds, which shouldn't be a cause for concern. Rattling sounds at startup or shutdown that resemble an unbalanced washing machine are also typical.
Unsettling Noises
Some loud noises can be signs of trouble. They include:
Gurgling — Low refrigerant charge often causes gurgling noises. It can severely downgrade your heat pump's performance.
Rattling — Frequent rattling or vibration-like sounds could be caused by loose components or unsecured ducts.
Metal-to-metal noises — At times, a heat pump can make banging or clanging sounds like metal hitting against metal. The fan blades could be hitting a chunk of ice or other components. The contact could damage the fan or the parts that the fan blades are hitting. To avoid costly repairs, turn the unit off as soon as you hear these noises.
Popping — This sound could be as a result of liquid refrigerant entering the compressor. You should have it fixed soonest possible.
Squealing — A high-pitched squealing sound could indicate your unit's motor is going bad. It could also be due to your compressor putting too much pressure on the refrigerant.
If your heat pump is making any of these worrisome sounds, call in an HVAC professional to examine it. If you need help with a noisy unit in the Broken Arrow area, contact the heat pump specialists at Air Assurance.
Our goal is to help educate our customers in the Tulsa and Broken Arrow, Oklahoma area about energy and home comfort issues (specific to HVAC systems). For more information about other HVAC topics, call us at 918-217-8273.