PILOT LIGHT TROUBLESHOOTING CHART
Section A: Pilot light will not light.
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| Check the manual gas |
Is the gas turned on? |
| NO |
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| see if it is in the open position, if it is open | ||
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| then contact the gas utility company. |
| YES |
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Section B: Pilot light will not remain lit or repeatedly goes out.
Is the thermocouple securely |
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| Make sure the thermocouple is securely | |
connected to the gas control |
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| connected. Finger tighten then give a | |
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valve/thermostat? |
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| additional 1/2 turn with a wrench. |
Have you bled all the air
from the pilot tube and NO gas supply line?
YES
Is the igniter producing a |
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NO |
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spark? |
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| YES |
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Is the pilot tube and/or orifice |
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NO |
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free from dirt and debris? |
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| YES |
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Is the pilot free from dirt and |
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NO |
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debris? |
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| YES |
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While repeatedly depressing the igniter button, hold down the reset button until the pilot is lit and maintains a stable flame, then slowly release the reset button.
Follow the Testing the Igniter System instructions in this manual.
Follow the Replacing the Pilot Assembly instructions found in this manual to access pilot tube and orifice. Clean as needed and reinstall pilot tube and orifice.*
Follow the Cleaning the Pilot Assembly instructions found in this manual.*
YES |
Test the thermocouple using the following procedure: Disconnect the thermocouple from the gas control valve/thermostat. Using a multimeter with alligator clip leads, attach the red lead to the body (copper part) of the thermocouple. Attach the black lead to the end (silver part) of the thermocouple that connects to the gas control valve/ thermostat. Follow the instruction to light the pilot and watch the voltage readings on the multimeter. After 45 seconds the meter should read 12 millivolts DC or more.*
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| Is the thermocouple fully |
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Does the thermocouple pass the test? |
| NO |
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| seated in the pilot bracket? |
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| YES |
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| YES |
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| NO |
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| Push the thermocouple | ||||
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| forward until it is fully seated in | |||||||||||||
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| Replace the thermocouple. |
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| the pilot bracket and retest. | ||||
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| Follow the Replacing the Pilot Assembly | ||||||||||||
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Is the pilot tube and/or orifice |
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Is the pilot protected from cold |
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| Eliminate any drafts. See the | |
drafts that could prevent it |
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| “Site Location” instructions found |
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from lighting. |
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| in this manual. | |
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| YES |
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Remove the burner door assembly. |
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Is the flame arrestor free from dirt or |
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| Clean the flame arrestor | ||||
debris? See “Removing the Burner |
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| with a soft bristle brush | ||||
| NO |
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Door Assembly” section of the manual |
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| or vacuum cleaner. | ||||
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for removal instructions.* |
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| YES |
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Check the water heater for a Flammable Vapor (FV) event.
If the flame arrestor show signs of discoloration,
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| NO |
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| pilot tube and orifice. Clean as needed and | ||||||||||||
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free from dirt and debris? |
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| reinstall pilot tube and orifice.* |
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| YES |
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| Follow the Cleaning the Pilot Assembly | |||||||
Is the pilot free from dirt and debris? |
| NO |
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| instructions found in this manual.* | |||||||||||||||||||||
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| YES |
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Check for insufficient combustion air. |
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| Install correct size | |||||||||||
Are there openings for |
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| NO |
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| Combustion Air and Ventilation section in this | ||||||||||||||||||||||
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room? |
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| manual. |
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| YES |
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Are the openings of sufficient size? |
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| Correct size of openings to |
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See Combustion Air and Ventilation section in |
| NO |
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this manual for requirements. |
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| YES |
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NO Is there a furnace/air handler in the same room as the water heater?
YES
Does the return air duct for the furnace/ air handler draw its air from a separate location than the water heater? See Facts to Consider About the Location section and the Combustion Air section.
YES
Is there proper drafting at the
draft hood? See Draft Hood NO Operation section in this manual.
YES
Contact a local Heating, Ventilation,
NO & Refrigeration authorized service provider.
Check the vent system for restrictions/obstructions and check the vent termination height. Refer to the Installation Instructions section of this manual for specific requirements.
* This procedure requires the removal of water heater components.
Remove the burner door |
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assembly. Is the flame arrestor |
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| Refer to the Service and Adjustment | ||||
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and burner free from debris due to |
| NO |
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| cleaning the flame arrestor and burner. | |||||
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excessive lint, dirt, dust or oil? |
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| YES |
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Does the flame arrestor show signs of discoloration. NO
YES
Replace the gas control
Service at:
30