Modern-day HVAC and air conditioning units are quiet for the most part. They operate at lower sound levels of around 30 decibels, about the levels of a quiet conversation indoors. So it can be especially alarming if an air conditioner suddenly starts making loud screeches and banging noises. These sounds are signs that the unit needs repairs.
This article will explore common noises an air conditioner can make and what it might mean.
RATTLING NOISES FROM LOOSE SCREWS AND DEBRIS
A rattling noise is one of the most common HVAC unit issues. It can be due to incorrectly sealed parts, loose screws, or problems with the motor compressor. A professional should tighten and adjust all aspects of an HVAC unit to eliminate this noise.
Rattling sounds can also come from debris, such as twigs, leaves, and dirt that may have fallen inside the compressor. Experts can open up the necessary parts, remove the debris, and reassemble the unit for continued use.
BANGING NOISES AND COMPRESSOR PROBLEMS
Banging from an HVAC unit indicates that the compressor is malfunctioning. The compressor sends refrigerant through the unit to lower the temperature. Smaller components inside the compressor can become loose, hitting the interior. Banging noises often happen, along with rattling, when the HVAC unit is relatively old.
In this case, it’s best to contact a professional for repairs. It’s also possible that homeowners might need to replace the entire HVAC unit itself.
SCREECHING NOISES DUE TO THE FAN MOTOR
Many homeowners will be alarmed when their HVAC unit starts screeching. This is common when the fan motor from the condenser unit malfunctions. The fan is responsible for efficiently moving refrigerant from the condenser to other parts. Sometimes it might misalign, become undone, or sustain damage.
This can be hard to diagnose without expert knowledge, so it’s important to call an HVAC professional if homeowners notice shrieking or screeching sounds.
BUBBLING IN THE DRAINAGE LINE
Though uncommon, air conditioning units can sometimes make bubbling noises. This is usually due to excess moisture trapped within the drainage line. Potential causes are openings, cracks, or holes. If so, the drainage pipe will need replacement.
But, homeowners shouldn’t attempt this replacement by themselves. Installing new components requires both expertise and special equipment. A professional can replace the drainage pipe for optimal efficiency.
HISSING NOISES AND REFRIGERANT LEAKS
A hissing noise coming from the air conditioning unit needs immediate attention. It usually indicates a refrigerant leak due to openings in connections, tubes, and valves. This issue is a potential environmental hazard and also reduces cooling efficiency. A refrigerant leak can also lead to additional energy expenses, making repairs cost-effective in the long term.
Consult a professional to address all refrigerator noises at the first opportunity.
Hacienda Air is a locally owned HVAC company offering air conditioning, heating, ductwork, air quality, and more to residential and commercial customers in North Las Vegas, Summerlin, and surrounding areas. Call us today at (702) 707-4953.