Heat Pump: YHJD / YHJF Re: Contactor Won't Energize The defrost board does not energize the contactor on the outdoor unit. No Compressor Operation No Outdoor Fan Operation ► This condition is often mis-diagnosed as a Bad Defrost Board when the board is actually in a Lockout. ► There...

York Heat Pumps: YHJF Re: Heating - High Electric Bill When the customers reports an electric bill that is much higher than normal, that typically means that the auxiliary heaters are operating more than normal. ► The blower and auxiliary heaters are typically working normally or the...

York Heat Pump: YHJF Re: Low Suction Pressure in Heating Mode Qty Possible Causes: 1 Low Refrigerant Charge 6 Bad Outdoor Expansion Valve Defrost Problem Bad Cod Fan Motor CHECKOUT: 1. Check Equipment Status Ensure that the outdoor...

Make: York Model or Series: YHJF36 with AHX42 Type: Heat Pump and Air Handler Problem Description: Unit making noise & head pressure a little high Observed Symptoms: Head pressure around 350 psi Head pressure drops when electric heat comes on Indoor blower speed increases when...

YHJF60 Add-On Heat Pump Re: Low Heat When Cold Outside Unlike all other sizes of the YHJF Heat Pump, the 5 Ton model has a 2-Stage compressor and a YorkGuard VI module. In an Add-On Heat Pump application, the YorkGuard VI module uses its Outdoor Ambient Sensor and a field-installed Bonnet...

York Heat Pumps: Heating Re: Low Heat The customers reports that the heat pump doesn't provide enough heat and that they only get warm air when the auxiliary heat kicks on. Other symptoms include: Higher than normal electric bill; System runs continuous. Qty Possible Causes: 1...

York Heat Pump: YHJF24 - 48 Re: Not Defrosting / Frozen The YHJF 2 to 4 Ton models use a Demand Defrost control board (the 5 Ton model uses a Yorkguard VI) The defrost board uses an Ambient (outdoor) Sensor and Liquid Line Sensor to determine the proper conditions for defrost to occur. ...

York Heat Pump: YHJF Re: High Pressure Lockout - Heating Mode The heat pump was running in normal heat mode (not in defrost) and the high pressure switch tripped. Qty Possible Causes: 1 Refrigerant OverCharge 1 Bad O/D Expansion Valve Bad Blower Motor /...