Heat Pump Defrost Board Problem

Check control transformer power 24v.

Heat pump defrost board problem.

When heat pump is operating in defrost mode ice will thaw from around outdoor coil and water will flow from the unit. 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. Amazing to have joined the board just in time to post the first question on the heat pump forum.

The ice and frost on the heat pump condenser coils need to be removed. No power 24v to board terminals r c or board failure. 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. The outside fan will not run.

Icing up heat pump frozen in winter. Heat pump troubleshooting problem 1. Heat pump problems defrost. The defrosting relays make the cycle occur every 30 min or so.

The next heat pump problem on the list is the heat pump defrost board. A circuit board in the most common system works off of input and output. The heat pump condenser operates below the dew point and collecting frost and ice on the heat pump condenser coils. 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. 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. Use the trane heat pump troubleshooting guides below.

Haven t determined yet whether the relay is bad or something in the defrost control is calling for the fan to be. Using multimeter i have determined that the nc relay on the dfc board is open. 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. Remove fc1 and fc2 fiises from fuseholder.

Start with the basics and work your way to the problem. Clicking noise heard inside. Verify that fc1 and fc2 fuses on fuse board are not open.