Heat Pump Defrost Board Problem

That is true for air conditioner troubleshooting heat pump troubleshooting or gas furnace troubleshooting.

Heat pump defrost board problem.

Clicking noise heard inside. Heat pump troubleshooting problem 1. The next heat pump problem on the list is the heat pump defrost board. 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. Verify that fc1 and fc2 fuses on fuse board are not open. 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. I have an 18 yr old trane heat pump with a 21c140501 defrost control board.

Icing up heat pump frozen in winter. The heat pump condenser operates below the dew point and collecting frost and ice on the heat pump condenser coils. The defrosting relays make the cycle occur every 30 min or so. The outside fan will not run.

No power 24v to board terminals r c or board failure. Use the trane heat pump troubleshooting guides below. However there s a process in most heat pumps which fixes the iced up problem within the defrost mode. In the winter heat pump icing up is often perfectly normal.

Start with the basics and work your way to the problem. The ice and frost on the heat pump condenser coils need to be removed. The defrost board controls the defrost in the colder months. Haven t determined yet whether the relay is bad or something in the defrost control is calling for the fan to be.

Every so often the unit will go into defrost mode to remove. 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. Using multimeter i have determined that the nc relay on the dfc board is open. If power is available to board and led s do not light replace board.

Remove fc1 and fc2 fiises from fuseholder. 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.