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AC NOISES
What Common Residential AC Noises Mean
Your air conditioner is an important part of keeping your home cool and comfortable. But sometimes, it starts making strange noises that can be concerning. While some sounds are normal, others may indicate a problem that needs fixing. Here’s a guide to common AC noises and what they might mean.
Banging or Clanking
If your AC is making loud banging or clanking noises, there may be a loose or broken part inside the unit. This could be a fan blade, a connecting rod, or even the compressor itself. If you hear this sound, turn off your AC and call a professional.
Buzzing
A buzzing AC noise could mean several things, such as loose parts, debris inside the unit, or electrical issues. It might also be a sign that your AC’s air filter is clogged or that the refrigerant levels are too low. If the buzzing is persistent, it’s best to have a technician inspect it.
Clicking Sound
A clicking noise when your AC turns on or off is normal. However, if the clicking continues constantly, it could be a problem with the thermostat or an electrical component. If you hear frequent clicking, it’s a good idea to have an expert check it out.
Hissing Noise
A hissing sound often means there’s a refrigerant leak. This is a serious problem because refrigerant is necessary for cooling your home. A leak can also be dangerous to your health. If you hear hissing, turn off your AC and contact a professional immediately.
Squealing or Screeching
High-pitched squealing or screeching sounds are often caused by a belt or motor issue. If the belt is worn out, it may need to be replaced. If the sound is coming from the motor, it could be a sign that the bearings need lubrication. Either way, a technician should check it out before the problem gets worse.
Gurgling or Bubbling
A gurgling or bubbling noise may mean there’s an issue with the refrigerant line or a clog in the drainage system. If the drain line is blocked, water may not be flowing out properly, which could cause water damage over time.
Rattling
If your AC is rattling, it might be due to loose screws, debris inside the system, or an issue with the fan. Sometimes, small twigs or leaves get stuck inside the outdoor unit. Cleaning the unit and tightening loose parts can help, but if the noise continues, it may be a bigger issue
Whistling Sound
A whistling or wheezing sound usually means there is restricted airflow. This can happen if the air filter is clogged, the vents are blocked, or there’s a duct leak. Changing the filter and making sure all the vents are open may solve the problem. If not, a technician can check the ducts for leaks.
When To Call a Professional
Don’t Ignore AC Noises
If your AC is making loud, persistent, or unusual noises, it’s best to call a professional HVAC technician. Ignoring the problem can lead to bigger repairs and higher costs down the road. Regular maintenance can also help prevent these issues and keep your AC running smoothly.
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