York Gas Furnace Re: Water Leak / Clear Condensate Pan Covers All of the 33" gas furnaces originally came with a clear, plastic condensate pan cover. Over time, the clear plastic pan has a tendency to crack and cause condensate leakage inside the furnace cabinet. Any clear condensate pans...

York Gas Furnaces: TM9T 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...

York Gas Furnace: TM9T Re: Flashing Code 1 Code 1 = Flame sensed with no call for heat. In a Code 1 situation, the furnace control board thinks that the gas valve is stuck on and the flame is still burning without a call for heat. Therefore, when a control board goes into a code 1, it will...

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...

York Gas Furnace: TM9T 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...

York Gas Furnace: TM9T Re: Flashing Code 5 Code 5 = Roll-out switch has opened its normally closed contacts or low voltage fuse blown. The control will operate the supply air blower and inducer while the open limit condition exists. ► The primary limit is wired in series with the roll-out...

York Gas Furnace: TM9T 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. ► There are 3 pressure switches on this furnace. 1LP (1st Stage Switch) and 3LP (Condensate Switch) are...

York Gas Furnace: TM9T Re: No Heat - Flashing Code 7 Code 7 = Indicates that the flame could not be established. This no-light condition occurred 3 times (2 retries) during the call for heat before locking out. ► The furnace will lock out for one hour and then attempt a restart. ...

York Gas Furnace: TM9T Re: No Heat - Flashing Code 8 Code 8 = Flame was established but then lost - 5 times. ► This is a Soft-Lockout which will automatically reset after 1 hour. Qty Possible Causes: Dirty Flame Sensor Clogged Burners No or Low Gas Pressure ...

York Gas Furnace: TM9T Re: No Heat or Cool - Flashing Code 9 Code 9 = Indicates reversed line voltage polarity, reversed low voltage wiring, or Grounding problem Qty Possible Causes: 1 Loose Ground Missing Ground Reversed Line Voltage ("Hot" on white) ...