Heat Pump Defrost Board Problem

No power 24v to board terminals r c or board failure.

Heat pump defrost board problem. Haven t determined yet whether the relay is bad or something in the defrost control is calling for the fan to be. 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. The next heat pump problem on the list is the heat pump defrost board. Heat pump problems defrost.

However there s a process in most heat pumps which fixes the iced up problem within the defrost mode. When heat pump is operating in defrost mode ice will thaw from around outdoor coil and water will flow from the unit. Icing up heat pump frozen in winter. Verify that fc1 and fc2 fuses on fuse board are not open.

Amazing to have joined the board just in time to post the first question on the heat pump forum. Heat pump troubleshooting problem 1. In the winter heat pump icing up is often perfectly normal. If power is available to board and led s do not light replace board.

The defrost board controls the defrost in the colder months. Using multimeter i have determined that the nc relay on the dfc board is open. Every so often the unit will go into defrost mode to remove. Of course depending on the issue will depend on where and what you look at with the system.

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. Check control transformer power 24v. Clicking noise heard inside. That is true for air conditioner troubleshooting heat pump troubleshooting or gas furnace troubleshooting.

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 outside fan will not run. Use the trane heat pump troubleshooting guides below. The ice and frost on the heat pump condenser coils need to be removed.

The defrosting relays make the cycle occur every 30 min or so. Remove fc1 and fc2 fiises from fuseholder. I have an 18 yr old trane heat pump with a 21c140501 defrost control board.