Yorkguard IV and V Re: Lockout Codes / Fault Codes The Yorkguard IV and V boards both have diagnostic functionality that will energize the X/L terminal to flash a light at the indoor thermostat if abnormal operating conditions occur. Unlike the Yorkguard VI, the number of flashing lights on...

Honeywell Thermostats Re: Red Light on Thermostat Flashing Some York Heat Pumps have a diagnostic board that will flash a light or display "Error 40" at the thermostat when a fault condition occurs. The light will flash a certain number of times, pause, then flash the same number again. ...

Make: York Model or Series: Yorkguard Type: Heat Pump Problem Description: Thermostat red light flashing continuous Observed Symptoms: Rapid red flashing at thermostat Solution: Analyzer plugged-in. Additional Information: On a unit equipped with a Yorkguard IV, plugging-in a...

York Heat Pump: Yorkguard IV & Yorkguard V Re: Flashing Code 2 (Cooling) Code 2 = High Discharge Pressure If the Hi Pressure circuit input on the Yorkguard opens, the module will go into a Code 2 lockout and disable compressor operation. Qty Possible Causes (Cooling): ...

York Heat Pump: Yorkguard IV & Yorkguard V Re: Flashing Code 2 (Heating) Code 2 = High Discharge Pressure If the Hi Pressure circuit input on the Yorkguard opens, the module will go into a Code 2 lockout and disable compressor operation. Qty Possible Causes (Heating): 1 ...

Heat Pump: Cooling Re: Code 3 - High Discharge Temperature The Yorkguard Module on this heat pump has a temperature sensor on the compressor discharge line. If the Yorkguard senses a discharge temperature above 250 deg. the unit will enter a lockout mode and flash a code 3. Normal...

York Heat Pump: Yorkguard IV & Yorkguard V Re: Flashing Code 4 / Compressor Won't Run Code 4 = Low Compressor Discharge Temperature Code 4 is sometimes listed as "Compressor Not Operating", as this is one of the more likely causes. (see Possible Causes below) The Yorkguard IV & V...

York Heat Pump: EFH Re: Flashing Code 5 Code 5 - Defrost Fault (Going into defrost too often). These units use a Yorkguard Demand Defrost control board. The board uses an Ambient (outdoor) Sensor and Liquid Line Sensor to determine the proper conditions for defrost to occur. ► If the board...

York Heat Pump: EFH Re: Not Defrosting / Outdoor Coil Frozen These units use a Yorkguard Demand Defrost control board. The board uses an Ambient (outdoor) Sensor and Liquid Line Sensor to determine the proper conditions for defrost to occur. Qty Possible Causes: 1 Bad Liquid...