Trane Heat Pump: 4TWB, 2TWR, 4TWR Re: Defrost Problem / Frozen Outdoor Coil The outdoor unit becomes completely covered in thick, white ice. Qty Possible Causes: Bad Coil Sensor 1 Mis-Located Coil Sensor Inoperative Condenser Fan Motor Bad Defrost...

Trane Heat Pumps: 4TWB3030C1000A Re: Missing Liquid Line Mounting Clip Certain heat pumps have been shipped without a clip that secures the liquid line assembly to the cabinet. If installed without a clip, the unit may generate unacceptable noise due to vibration. The vibration could also...

Trane Heat Pumps: 4TWA3, 4TWB3 Re: Premature Fan Motor Failure A potential issue associated with outdoor fan motor bearings on certain Split Systems and Impack™ units. These suspect units may be at risk of premature failure due to an improper wick placement in the outdoor fan motor.

Trane Heat Pump: 4TWB3 Re: Outdoor Unit Not Running The thermostat is calling for either HEATING or COOLING. The Indoor fan is operating. Neither the Outdoor Fan or Compressor are operating. Qty Possible Causes: Bad Dual Capacitor Tripped Breaker 1 Low...