Do you hate waking up in the middle of the night to a noise that sounds like a monster coming from your HVAC unit? This type of sound isn’t normal and it could mean that something is amiss with your home HVAC system. Follow the tips below to eliminate HVAC system noises and get a good night’s sleep.
Banish the Banging
Are you hearing banging noises coming from your HVAC system? A few items could be causing this noise. Unfortunately, one of the major causes of a banging noise is the compressor motor starting to fail. A broken piston or connecting rod, failing crankshaft, or broken pin can also cause banging sounds in the motor.
Another cause of banging noises is the fan blades on the motor shaft being loose or bent. The blades could be striking obstructions when operating, too, so check the unit for any unwanted objects.
Other repairable causes of banging noises include failing motor bearings or a loose motor component. These issues are often the most likely causes of loud banging sounds. If you encounter any of these problems, shut off the unit to prevent further damage and contact an HVAC services professional.
Fix the Hissing
Monsters may hiss, but your HVAC unit should not. A valve inside the motor failing or sticking could be the cause behind steady hissing. Another culprit may be refrigerant starting to leak out of the unit. The refrigerant may hit a hot spot and turn to steam, which can cause the hissing sounds. Check for any leaks if you have a hissing issue with your HVAC system.
Stop the Squealing
A squealing sound coming from your HVAC system may be annoying, but it is usually one of the easiest problems to correct. The most common cause of a squealing sound is a bad belt coming from the blower mower. Belts are not an expensive repair if one happens to break, and an HVAC technician can make this type of repair for you.
Squealing can also come from a motor bearing that is starting to dry out. Many units should have ports where you add lubricant to keep the bearings spinning smoothly. Make sure you use the correct grade of oil and not a household lubricant.
Install Quieter Parts
If your old HVAC system is making too much noise, you can look to new forms of HVAC technology that make the unit’s operations more silent. You can find variable-speed blowers that run slower and make less noise. You can also buy a compressor that uses R410A refrigerant. Manufacturers are also now selling fan blades that are more aerodynamic and create less noise when they’re in use. Another upgrade is noise-dampening mounts that absorb vibrations.
If you discover any of these noises that sound like a monster is in your house, check out this list to find out whether your problem involves a repair from a qualified HVAC service technician to slay the noise monsters.