York Gas Furnace: RGPK
Re: No Heat - Flashing Code 1
Code 1 = Ignition Failure
► This is a Soft-Lockout which will automatically reset after 1 hour.
Qty |
Possible Causes: |
1 |
Dirty Flame Sensor |
|
Bad Glow Plug |
|
Clogged Burners |
|
No or Low Gas Pressure |
|
Bad Gas Valve |
CHECKOUT:
1. Check Ignition Sequence
- If the furnace is running, turn the thermostat off and allow the furnace to cool and the blower to stop operating.
- Initiate a call for heat from the thermostat and monitor the ignition sequence.
- 1. The inducer motor should start with no difficulty.
- 2. The pressure switch should close within a couple seconds of the inducer starting.
- 3. The glow plug should energize within 30 seconds of the pressure switch closing.
- 4. The gas valve should open within 20 seconds of the glow plug energizing.
2. Check Ignition
- Visually inspect the burners during ignition.
- The burners should light smoothly with little or no delay from the glow plug to the flame sensor.
- Make sure the flame sensor comes in good contact with the flame.
3. Check Glow Plug
- Look for any visual cracks.
- Unplug the 2-wire connector to the glow plug.
- Use a meter to test resistance of the glow plug.
- No Resistance = Bad Glow Plug
- Start an ignition sequence.
- Check for 120VAC power on the 2-wire plug feeding the glow plug during an ignition sequence.
- No Power = Bad Ignition Control
- Power Present + No Glow = Bad Glow Plug
4. Check Gas Pressure / Valve
- Inlet Gas Pressure
- Check the inlet gas pressure with the furnace off.
- Minimum Pressure = 5" w.c. for Nat. gas, and 11" w.c. for propane.
- Low Pressure = Bad Meter or Regulator
- Monitor the inlet gas pressure as the furnace attempts to ignite.
- Pressure Drops Below Minimum = Bad Meter/Regulator or Restricted Gas Line
- Manifold Gas Pressure
- Check the manifold pressure when the furnace attempts to ignite.
- Normal Pressure = 3 - 3.5" w.c. for Nat. Gas, 9 - 11" w.c. for LP
- No Gas Pressure = Bad Gas Valve
- Low Gas Pressure ⇒ Increase Manifold Gas Pressure
- Normal Gas Pressure + No or Delayed Ignition = Clogged Burners
5. Check Flame Sensor
- At the control board, check the Yellow status light when the flame lights.
- No Light = No Flame Sensed = Dirty Flame Senor or Bad Control Board
- Slow Flash = Low Flame Signal = Dirty Flame Sensor