Ensure ambient temperature is below 120°F(49°C) before using the system.
Check to see that the motor fan is moving. Measure voltage to fan. There should be 24 VDC. If no voltage is measured, check fan wiring.
If the fan has voltage but is not moving, replace fan.
If necessary use an air hose to blow out around the fan housings and remove any built up debris.
Verify wiring between the motor temperature sensor and the module.
Measure resistance between pins 1 and 2 on motor temperature cable connector (port 14 connector). Readings vary depending on temperature, but at room temperature (77°F/25°C), the resistance should be approximately 80k to 130k Ohms. An open circuit reading indicates a possible wire break. Replace motor.