Many people contact HVAC troubleshooting professionals when they notice ice forming on their air conditioner’s metal pipes. This issue can prevent the appliance from cooling the home and may indicate a leak that could short-circuit the AC motor. Here’s a look at why this happens and how to avoid it.

What Causes Ice Formation? 

Air conditioners transport liquid or gas refrigerant through metal coils. The system compresses this coolant between an indoor and an outdoor unit, moving hot air from the home to the outside while carrying cool air in.

The AC must have airflow over the evaporator coils to change the temperature. If circulation is restricted, the refrigerant won’t have enough warm air and can freeze. If the refrigerant levels are low, the pressure won’t be sufficient to move the warm air, potentially forming ice crystals on the metal refrigerant lines.

This system runs in a loop, so reduced refrigerant almost always means there’s a leak. You may notice this problem if you hear a hissing or bubbling sound from the outdoor system or see ice on the metal pipes. 

How Can You Prevent Freezing?

Homeowners should change their air filter at least once every three months to prevent dust buildup that reduces airflow. Keep furniture and window coverings away from indoor air vents, and create a 1-foot landscaping buffer zone around the outdoor unit to prevent plants from interrupting air intake.

It’s also wise to schedule an annual HVAC troubleshooting inspection. This will identify imminent problems with the blower fan or ductwork that may also minimize circulation.

If you notice warm air coming out of the AC vents or skyrocketing energy bills, call an HVAC professional as soon as you can. They’ll know how to assess the evaporator coils and check refrigerant levels to get your energy efficiency and comfort back on track.

Homeowners interested in HVAC troubleshooting should contact Service Air Eastern Shore in Baldwin County, AL. The company has been in business since 2000, featuring well-trained, certified technicians who can install, maintain, and repair heating and cooling appliances. Call the Silverhill company at (251) 990-8060 or visit the website for information on their service area, including Mobile County, and their 10-year labor guarantee for new installations.