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NUGK - Burners Won't Ignite
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...
8 Apr, 2025
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Y91E - Flashing Code 4
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...
21 Mar, 2025
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YM9M - Flashing Code 3
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...
21 Mar, 2025
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P1XU - Flashing Code 7
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 ...
3 Mar, 2025
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58MXA - Flashing Code 13/Fault Code 13
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...
28 Feb, 2025
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Yorkguard VI - Low Discharge Temperature (Heating)
York Heat Pump: Yorkguard VI Re: Low Discharge Temperature (Heating) The status lights on the module will indicate as follows: Red = On, Green = 6 Flash. If, after energizing the compressor contactor for 1 hour, the Yorkguard module senses a compressor discharge temperature lower than 90...
28 Feb, 2025
Comments: 0
Sanyo - Technical Support
Sanyo Variable Refrigerant Flow Re: Technical Support Sanyo was bought by Panasonic. For Technical Assistance / Support: PH: 800-851-1235
27 Feb, 2025
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TM9X/TM9E - Flashing Code 3
York Gas Furnace: TM9X/TM9E Re: Flashing Code 3 Code 3 = Furnace Pressure Switch failed to close on a call for heat. This gas furnace has two pressure switches (PS1 & PS2) - a higher pressure switch to monitor the negative pressure at the inducer motor, and a lower pressure switch to...
18 Feb, 2025
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TM9Y - Flashing Code 3
York Gas Furnace: TM9Y Re: Flashing Code 3 Code 3 = The normally open (PS1 or PS3) pressure switch contact did not close after the inducer was energized. ► This is a "Soft Lockout" which will automatically reset after 1 hour. ► There are 3 pressure switches on this furnace. PS1 (1st Stage...
18 Feb, 2025
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TG9S/GY9S - Flashing Code 6
York Gas Furnace: TG9S/GY9S Re: Flashing Code 6 Code 6 = Pressure switch opened (Code 3) 4 times during a run cycle. ► This is a "Soft Lockout" which will automatically reset after 1 hour. Qty Possible Causes: 3 Water in Inducer 1 Improper Condensate Drainage 1 ...
18 Feb, 2025
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TM9X/TM9E - Diagnostic Codes
York Gas Furnaces: TM9X/TM9E Re: Diagnostic Codes / Fault Codes These 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. !! Do Not go by the Fault Descriptions on the blower door -...
14 Feb, 2025
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TM8E Diagnostic Codes / Fault Codes
York Gas Furnaces: TM8E Re: Diagnostic Codes / Fault Codes These 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. !! Do Not go by the Fault Descriptions on the blower door - they are...
14 Feb, 2025
Comments: 0
TM9T - Flashing Code 3
York Gas Furnace: TM9T Re: Flashing Code 3 Code 3 = The normally open (1LP or 3LP) pressure switch contact did not close after the inducer was energized. ► This is a "Soft Lockout" which will automatically reset after 1 hour. ► There are 3 pressure switches on this furnace. 1LP (1st Stage...
13 Feb, 2025
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Rheem RPNL / RPQL - Low Pressure - Code L21 - Heating
Rheem Heat Pump: RPNL / RPQL Re: Heating - Low Pressure Lockout - Code L21 These heat pump models have a control board which monitors equipment operation. If the low pressure switch trips three times during a run-cycle, a "Hard-Lockout" Code L21 is generated and must be manually reset. ...
12 Feb, 2025
Comments: 0
Rheem RPNL / RPQL - Low Pressure - Code L21 - Cooling
Rheem Heat Pump: RPNL / RPQL Re: Cooling - Low Pressure Lockout - Code L21 These heat pump models have a control board which monitors equipment operation. If the low pressure switch trips three times during a run-cycle, a "Hard-Lockout" Code L21 is generated and must be manually reset. ...
12 Feb, 2025
Comments: 0
TM9Y Diagnostic Codes / Fault Codes
York Gas Furnaces: TM9Y Re: Diagnostic Codes / Fault Codes These 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...
10 Feb, 2025
Comments: 0
Yorkguard - Flashing Code 5
York Heat Pump: EFH Re: Flashing Code 5 Code 5 - Defrost Fault (Going into defrost too often). These units use a Yorkguard Demand Defrost control board. The board uses an Ambient (outdoor) Sensor and Liquid Line Sensor to determine the proper conditions for defrost to occur. ► If the board...
6 Feb, 2025
Comments: 0
YZE/YZH - High Discharge Temperature (Heating)
York Heat Pump: YZE/YZH Re: High Discharge Temperature Fault (Heating) A High Temperature Lockout is indicated by the following LED pattern on the outdoor unit control board: Green = 5 Flashes Red = On X/L Output 2 Flashes at Thermostat = Soft Lockout Locked-out two times in 6...
4 Feb, 2025
Comments: 0
4YCC4 - Flashing Code 4
Trane Package Unit: 4YCC4 Re: Flashing Code 4 Code 4 = High Limit or Roll-Out Switch Open * After 4 limit trips during a single call for heat, the control will enter a 1-Hour Soft Lockout and flash Code 4. Qty Possible Causes: Dirty Filter Bad Blower Motor ...
3 Feb, 2025
Comments: 0
MUZ-GE - Testing Outdoor Fan
Mitsubishi MUZ-GE Re: Test Outdoor Fan Motor The unit uses a DCV 3-Phase fan motor. 1. Test Winding Resistance Disconnect power to the outdoor unit. Wait at least 30 seconds for the capacitors to discharge. Disconnect the leads to the fan motor (Red, White & Blk). Test resistance...
31 Jan, 2025
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YHJF - High Pressure Lockout - Heating Mode
York Heat Pump: YHJF Re: High Pressure Lockout - Heating Mode The heat pump was running in normal heat mode (not in defrost) and the high pressure switch tripped. Qty Possible Causes: 1 Refrigerant OverCharge 1 Bad O/D Expansion Valve Bad Blower Motor /...
30 Jan, 2025
Comments: 0
Yorkguard VI - High Pressure Lockout - Heating
York Heat Pump: Heating Re: High Pressure Fault - Last Mode Heat Pump The heat pump was running in normal heat mode (not in defrost) and the high pressure switch tripped. A High Pressure Lockout is indicated by the following LED pattern on the outdoor unit control board: Green = Off Red...
30 Jan, 2025
Comments: 0
YHE/YHG - Code 3 - High Pressure - Heating
York YHE / YHG Heat Pump: Heating Re: High Pressure Fault - Last Mode Heat Pump The heat pump was running in normal heat mode (not in defrost) and the high pressure switch tripped. A High Pressure Lockout is indicated by a 3-Flash LED pattern on the outdoor unit control board. Qty ...
30 Jan, 2025
Comments: 0
YZF - High Pressure Fault (Heating)
York Heat Pump: YZF Re: High Pressure Fault (Heating) The heat pump was running in normal heat mode (not in defrost) and the high pressure switch tripped. A High Pressure Lockout is indicated by the following LED pattern on the outdoor unit control board: Green = Off Red = 2 Flashes X/L...
30 Jan, 2025
Comments: 0
GMS9 - Flashing Code 3
Goodman Gas Furnace: GMS9 Re: Flashing Code 3 If, after the vent blower is energized, the pressure switch does not close, the control will keep the blower on and wait for the switch to close. The diagnostic code for this problem is 3 short flashes followed by a pause. ► There are 2...
15 Jan, 2025
Comments: 0
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