Heat Pump Defrost Board Problem

Icing up heat pump frozen in winter.

Heat pump defrost board problem.

Heat pump troubleshooting problem 1. If you have problems with your trane heat pump don t rush to call for expensive master s help you can fix your device for free. During the cold winter months your heat pump s outside unit will sometimes be covered with a coating of frost on the sides or even light ice. Heat pump problems defrost.

Use the trane heat pump troubleshooting guides below. I have an 18 yr old trane heat pump with a 21c140501 defrost control board. The heat pump should defrost regularly when the frosting occurs and should be long enough to melt all of the ice but short enough to avoid energy waste. The defrosting relays make the cycle occur every 30 min or so.

No power 24v to board terminals r c or board failure. Haven t determined yet whether the relay is bad or something in the defrost control is calling for the fan to be. The outside fan will not run. If power is available to board and led s do not light replace board.

A circuit board in the most common system works off of input and output. Clicking noise heard inside. The heat pump condenser operates below the dew point and collecting frost and ice on the heat pump condenser coils. The ice and frost on the heat pump condenser coils need to be removed.

The next heat pump problem on the list is the heat pump defrost board. Every so often the unit will go into defrost mode to remove. However there s a process in most heat pumps which fixes the iced up problem within the defrost mode. That is true for air conditioner troubleshooting heat pump troubleshooting or gas furnace troubleshooting.

Amazing to have joined the board just in time to post the first question on the heat pump forum. When heat pump is operating in defrost mode ice will thaw from around outdoor coil and water will flow from the unit. In the winter heat pump icing up is often perfectly normal. Remove fc1 and fc2 fiises from fuseholder.

Check control transformer power 24v. Of course depending on the issue will depend on where and what you look at with the system. Using multimeter i have determined that the nc relay on the dfc board is open.