Precor Error Code 88 Drive Motor Temperature Too High

Feb 17, 2022

Applies to

TRM800-14(TRM800 version 2 treadmills mfg. dates 2014 and later.)/18 (TRM800.v2) treadmills

Issue symptoms

The MC monitors both the current delivered to the drive motor and a thermal switch connected from the motor to the MC. When the software perceives that excessive current has been required, an Error 88 will be displayed. Cycling power will allow the treadmill to restart. Additionally, a thermal switch is embedded into the drive motor housing. When the motor exceeds a certain temperature, an Error 88 is displayed, and the treadmill stops until the switch closes when the temperature drops.

Troubleshooting steps

Disconnect the thermal switch from the MC, and using an ohmmeter, measure across the switch. If the motor is hot and the switch is open, allow the motor to cool and repeat the test. If the motor is not hot and the switch is open, replace the motor.