Why does my heat pump system sometimes freeze up?

There are several factors that can cause system freezing. First, check your filters; restrictions in air flow can lead to freezing. Next, thaw the system out by turning off the cooling and running the fan. Also, try turning the system to the heat mode until the ice has melted.
If the problem still persists after checking for air restrictions and thawing your system call to schedule a licensed service technician to come out and check your unit. A service technician should check the refrigerant level. They may also have to clean the evaporator coil, check the blower speed, and check for any intermittency in blower operation. A service technician can also evaluate other conditions that may make your system prone to freezing and recommend the best course of action.
For more information contact McDonald Plumbing, Heating and Air at (916) 233-4194.

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