A knocking or banging sound from your heat pump is a worrying symptom of loose components, an unbalanced or damaged fan, or even compressor problems. Learn what is and isn’t normal for your heat pump and get expert HVAC repair from the team at Soundview HVAC.
The Most Common Causes of Heat Pump Knocking Noises
Knocking from your heat pump could be a mechanical problem that requires immediate HVAC repair. However, there are some cases where knocking is not only normal but expected. Here’s how you can tell the difference.
Common causes of knocking sounds from your heat pump include:
- Loose components like screws, bolts, or even the access panel. Vibrations can loosen these components over time, causing them to knock against the frame.
- A damaged fan or even an unbalanced fan can wobble and hit the casing inside the heat pump.
- Failed bearings in an old compressor can cause loud banging. This is an HVAC emergency and suggests that the compressor will soon fail. Call us immediately for 24/7 heat pump service if you hear loud knocking or banging.
- The defrost cycle may cause some noise. This is usually hard to notice. It’s a problem if the knocking is loud or persistent.
- Frozen Coils from low refrigerant or poor airflow can cause knocking and excessive vibrations as the heat pump works harder to run.
- Duct expansion and contraction (in a central heat pump system) can cause warping or knocking sounds, usually coming from your vents. You might notice this when you turn your system on after a period of inactivity. This is normal behavior caused by metal expanding and contracting with temperature changes. It should stabilize after your system runs for around 30 minutes.
If you are concerned about knocking and banging sounds, you can talk to Soundview HVAC for a detailed heat pump inspection. The best way to prevent knocking and other common issues is to book a seasonal HVAC tune-up before winter. Now is the best time to prepare your home for heating during the coldest months of the year.
Can You Fix Heat Pump Knocking Before Calling a Suffolk County HVAC Contractor?
There are some basic things you can check before calling an HVAC professional for heat pump repair in Suffolk County.
Always power your system down before performing user maintenance, and check your owner’s manual for specific steps and safety instructions. Improper maintenance may cause damage, injury, or void your warranty. If you aren’t comfortable checking your system, call for heat pump repair in Suffolk County instead.
- Check the screws and panels on your outdoor unit. Tighten anything that’s loose and run your system to see if the problem is resolved.
- Clear debris from the outdoor unit. Sometimes intermittent knocking is caused by small twigs and other items that get into the shroud and hit the fan blades.
Frequently Asked Questions
How Long Should My Heat Pump Last?
Modern heat pumps are expected to last around 10 to 15 years, but some high-efficiency models could last 20 years or even longer. If your heat pump is over 10 years old and has developed significant problems, it’s worth considering a new heat pump installation. You will benefit from a more efficient unit with a fresh warranty.
What Should I Do if My Electric Bill is Higher Than Expected?
If your heat pump is using more energy than expected, it might need a tune-up or repair. Start the season right with a professional tune-up from Soundview HVAC. We also offer Planned Maintenance Packages to make regular cleaning and tune-ups hassle-free.
24/7 Heat Pump Repair in Suffolk County
Is your heat pump making knocking sounds, or do you have other home comfort concerns? Soundview HVAC is available for 24/7 heat pump repair in Suffolk County. Get the best service to keep your home safe and warm this winter. Call us today at 631-209-1744.
