Trane Heat Pump: Force a defrost cycle with the button
Force a defrost cycle with the button on a Trane heat pump: Holding the forced defrost button on the control board starts a defrost; the display then shows 7 as the first digit (Defrosting). Not possible in cooling.
Applies to: 5TWR7 multi-speed outdoor drive
How to fix force a defrost cycle with the button: step by step
- Run the unit in heating mode with the thermostat calling
- Hold the forced defrost button on the control board down for over 5 seconds
- The display shows 7 as the first digit when forced defrost begins
If the unit shows an error code, look it up: Trane Heat Pump codes
Models
5TWR7024A5TWR7036A5TWR7048A5TWR7060A
Source: Trane 5TTR7/5TWR7 installation ODR-SVN002E-EN, Forced Defrost, p.34. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.