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...

Trane Gas Furnace: TUX/TDX Re: No Heat - Code 2 Code 2 = 3 Failed Ignition Attempts Qty Possible Causes: 1 Bad Glow Plug Dirty Flame Sensor Clogged Burners No or Low Gas Pressure Bad Gas Valve Bad Control Board Chattering...

Trane Gas Furnace: TUH1/TDH1 Re: Flashing Code 3 Code 3 = Pressure switch fault This furnace uses a dual-hose (differential pressure) pressure switch. You need to monitor both hoses at the same time to see actual working pressure. A Code 3 will result from either of the following conditions: ...

Trane Gas Furnace: TUH/TDH Re: No Heat - Code 2 Code 2 = 3 Failed Ignition Attempts Qty Possible Causes: 1 Bad Glow Plug Dirty Flame Sensor Clogged Burners No or Low Gas Pressure Bad Gas Valve Bad Ignition Control ...

Trane Gas Furnace: TUD/TDD Re: No Heat - Code 2 Code 2 = 3 Failed Ignition Attempts Qty Possible Causes: 1 Bad Glow Plug Dirty Flame Sensor Clogged Burners No or Low Gas Pressure Bad Gas Valve Bad Ignition Control ...

PRO1 Thermostat: T755 Re: Installer Setup Options To enter Installer Setup: Press the "MENU" button. Press and hold the "TECH SETUP" button for 3 seconds. Use the PREV and NEXT keys to move between setup items. Use the + and - key to change options. Press the "DONE" key to exit. ...