Heat Pump Defrost Board Problem

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.

Heat pump defrost board problem.

The next heat pump problem on the list is the heat pump defrost board. Using multimeter i have determined that the nc relay on the dfc board is open. The ice and frost on the heat pump condenser coils need to be removed. Clicking noise heard inside.

Icing up heat pump frozen in winter. 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. Haven t determined yet whether the relay is bad or something in the defrost control is calling for the fan to be.

That is true for air conditioner troubleshooting heat pump troubleshooting or gas furnace troubleshooting. Heat pump troubleshooting problem 1. When heat pump is operating in defrost mode ice will thaw from around outdoor coil and water will flow from the unit. The outside fan will not run.

Of course depending on the issue will depend on where and what you look at with the system. Check control transformer power 24v. If power is available to board and led s do not light replace board. No power 24v to board terminals r c or board failure.

Amazing to have joined the board just in time to post the first question on the heat pump forum. The heat pump condenser operates below the dew point and collecting frost and ice on the heat pump condenser coils. A circuit board in the most common system works off of input and output. Start with the basics and work your way to the problem.

In the winter heat pump icing up is often perfectly normal. Verify that fc1 and fc2 fuses on fuse board are not open. Heat pump problems defrost. The defrosting relays make the cycle occur every 30 min or so.

Use the trane heat pump troubleshooting guides below. Every so often the unit will go into defrost mode to remove. The defrost board controls the defrost in the colder months.