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...

Honeywell Thermostat: TH4110U T4 Pro Re: Installer Setup Options To enter Installer Setup: Press and hold the "Center" button and the "+" button together for 3 seconds. Press "Select" to enter Setup. Press "Select" to cycle through setup options. Press "+" or "-" to change values. Press...

Goodman Gas Furnace: GMH95 / GCH9 Re: Flashing Code 3 Code 3 = Pressure Switch failed to close with the inducer energized. ► There are 2 Pressure Switches in the furnace. Only the Inducer Pressure Switch will cause a Code 3. The Drain Pressure Switch (labeled as Front Cover Switch) breaks...

Package Unit: GPG13 Re: Code 2 CODE 2 = Pressure switch "Open" with the inducer motor energized. Qty Possible Causes: 2 Bad Inducer Motor Bad Pressure Switch 1 Clogged Pressure Port Item Stuck in Inducer Wheel 1 Bad Ignition Control Board ...

York Gas Furnace: PHU Re: No Heat - Code 7 Code 7 = Failure to Sense Flame Qty Possible Causes: 7 Dirty Flame Sensor 6 Bad Glow Plug 1 Clogged Burners 1 Bad Gas Valve No or Low Gas Pressure Bad Control Board CHECKOUT: 1....

​​Goodman Package Unit: GPG14 Re: Flashing Code 1 Code 1 = 3 Failed Ignition Attempts Qty Possible Causes: 1 Dirty Flame Sensor 1 Bad Control Board Low / No Gas Bad Gas Valve 2 Bad Spark Electrode or Spark Wire CHECKOUT: 1. Check...

Goodman Gas Furnace: GMS8/GDS8/GHS8 Re: Short-Cycling / Won't Ignite - No Codes The furnace starts an ignition sequence, then shuts-off and re-starts at the point of ignition. Qty Possible Causes: 3 Shorted Gas Valve Bad Ignition Control Board CHECKOUT: 1....