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...

Nordyne Gas Furnace: G6RC Re: Flashing Code 1 Code 1 = Limit switch open If the limit control opens, the burners will be de-energized and the air circulation and vent blower will be turned on until the limit closes. The diagnostic light code for this is one short flash followed by a...

Amana Gas Furnace: GULA Re: Flashing Code 4 Code 4 = Main limit switch (auto-reset) has opened its normally closed contacts, or the Blower Auxiliary Limit (manual-reset) has tripped. The control will operate the supply air blower and inducer while the open limit condition exists. Qty...

York Gas Furnace: TG9S/GY9S Re: Flashing Code 4 Code 4 has two possible meanings: Code 4 = Limit switch circuit is currently open. If the limit switch circuit opens during a call for heat, the control will indicate 4 Red Flashes. ► The control will operate the supply air blower and...

York Gas Furnace: TG9S/GY9S Re: No Heat - Flashing Code 7 Code 7 = Three consecutive failed ignition attempts (failed to sense flame). ► This is a "Soft-Lockout" which will automatically reset/retry after 1 hour. Qty Possible Causes: 10 Dirty Flame Sensor 3 Bad...

York Gas Furnace: TM9Y Re: Flashing Code 4 Code 4 has two possible meanings: Code 4 = Limit switch circuit is currently open. If the limit switch circuit opens during a call for heat, the control will indicate 4 Red Flashes. ► The control will operate the supply air blower and...