Trane Package Unit: 4WCX Re: Indoor Blower Not Running The 4WCX package unit uses a standard, PSC motor. The motor is controlled by a Fan-Delay Relay (FDR). Qty Possible Causes: 1 Bad Fan-Delay Relay (FDR) Bad Blower Motor Bad Capacitor No Call for...

Trane Package Unit: 4WCX Re: Blows Heat in Cooling Mode The customer reports that the thermostat was set for cooling, but the unit was blowing hot air. Qty Possible Causes: Low Voltage Problem Mis-Configured Thermostat Loose Wire on Reversing Valve ...