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29 Feb, 2016
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Climatemaster Diagnostic Codes
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...
6 Apr, 2017 Comments: 0
York Furnace Lockout and Diagnostic Codes
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...
14 Feb, 2017 Comments: 0
Fujitsu - Error A1
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...
5 Feb, 2022 Comments: 0
Waterfurnace - Fault Codes
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...
19 Apr, 2017 Comments: 0
Trane GAM5 - Status/Error Codes
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...
1 Sep, 2017 Comments: 0

Recent Articles
Climatemaster - Code 2 / High Pressure Fault - Cooling
Climatemaster Geothermal: TT/TS Re: Code 2 / High Pressure Fault - Cooling Code 2 = High Pressure Fault ► There may be (2) Water Pressure Switches wired in series with the refrigerant High Pressure Switch. ► When the high pressure switch opens due to high refrigerant pressures the...
16 Jul, 2024 Comments: 0
Gas Furnace - Won't Come On/No Heat
Gas Furnaces Re: Furnace Won't Come On / No Heat This condition is generally reported two different ways by the customer: "The furnace won't do anything." - Indicating that there is no activity from the furnace on a call for heat. "The furnace makes a noise, but it never blows-out hot...
29 May, 2024 Comments: 0
Aaon WSHP Lockout Codes
Aaon Water-Source Heat Pump: WHA Re: Diagnostic Codes / Error Codes / Fault Codes The Red fault light will flash to indicate fault status. Red Flashes Description 1 High Pressure Switch Fault 2 Emergency Shutdown 3 Auxiliary Alarm 4 Condensate Overflow...
15 May, 2024 Comments: 0
Climatemaster - Code 3 / Loss of Charge
Climatemaster Geothermal: Heating / Cooling Re: Code 3 / Loss of Charge Code 3 = Low Pressure Fault The low pressure switch must be open and remain open for 30 continuous seconds during an “on” cycle to be recognized as a low pressure fault. If the low pressure switch is open for 30...
9 May, 2024 Comments: 0
YEE - Fault Code 5 (Heating)
York Heat Pump: YEE Re: Low Suction Pressure - Code 5 (Heating) CODE 5 = Low Pressure Switch Opened (2x in 6 hours) Qty Possible Causes: 2 Low Refrigerant Charge Bad Expansion O/D Valve Bad Pressure Switch Not Defrosting CHECKOUT: 1....
30 Apr, 2024 Comments: 0