Geothermal Heat Pump: Climatemaster Re: Diagnostic Codes CXM Board - Most older Climatemaster Geothermal heat pumps use the CXM Control Board. The CXM board has a diagnostic function that will cause the unit to go into a "lockout" if an abnormal operating condition occurs. When the CXM...

York Gas Furnaces Re: Lockout Codes Most York gas furnaces have a control board inside the furnace blower compartment that will flash a diagnostic code that shows the operating status of the furnace. Diagnostic Codes: Slow Green Normal Operation - no call for heat Slow...

Fujitsu Mini-Split Re: Error A1 Error Code A1 = High Compressor Discharge Temperature Also indicated on the control board by 10 Green flashes and 1 Orange flash. Qty Possible Causes: 3 Low Refrigerant Charge Bad Sensor CHECKOUT: 1. Check Unit...

Geothermal Heat Pump: Waterfurnace Re: Diagnostic Codes These units can have either an Aurora Base Control (ABC) or an Aurora Expansion Board (AXB). The ABC board has a diagnostic function that will cause the unit to go into a "lockout" if an abnormal operating condition occurs. When the...

Trane Air Handler: GAM5 Re: Status Codes / Error Codes / Fault Codes EVC STATUS LED Flash Description 1 Cool Mode - No Active Call 3 Cool Mode - Active Call for Cooling or Defrost 4 Heat Mode or Off - No Active Call 6 Heat Mode - Active Call for...

Heil Gas Furnace: NUGK Re: Burners Won't Ignite These furnaces use a Honeywell spark ignition control and universal electronic ignition (3-wire) gas valve. When the ignition control receives 24VAC on "TH" or "25V" it should start sparking through the ignition cable and send power out "PV" to...

York Gas Furnace: Y91E Re: Flashing Code 4 Code 4 = Main limit switch has opened its normally closed contacts. The control will operate the supply air blower and inducer while the open limit condition exists. ► If the limit switch has not closed within five minutes, the control will assume...

York 90% Gas Furnace: YM9M Re: Flashing Code 3 Code 3 = Furnace Pressure Switch failed to close on a call for heat. ►The code description on the blower door may say, "Vent or Termination Problem" which is a possible cause, but not the most likely. This gas furnace has two pressure...

York Gas Furnace: P1XU Re: No Heat - Flashing Code 7 (Assuming original control board) Code 7 = Failure to Sense Flame Qty Possible Causes: 1 Dirty Flame Sensor 1 Bad Glow Plug 1 Clogged Burners Intake Problem No or Low Gas Pressure ...

Carrier Gas Furnace: 58MXA Re: Flashing Code 13 / Fault Code 13 Code 13 =Limit or Flame Roll-Out Lockout Diagnostic Light Sequence: 1-Short Flash, 3-Long Flashes (- , — — — ) ► A Code 13 is generated when the limit circuit has been open for more than 3 minutes. ► Auto-Resets after 3...