![PILOT LIGHT TROUBLESHOOTING FLOWCHART](/images/new-backgrounds/52175/5217575x1.webp)
PILOT LIGHT TROUBLESHOOTING FLOWCHART
| Does pilot light go out when |
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| Check Draft. (See “Checking the |
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| NO |
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| button is released? |
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| Draft” section of this manual.) |
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| YES |
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| Test the thermocouple using the following | ||||
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| procedure: Disconnect the thermocouple from the | ||||||||
| Has the thermal switch |
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| Are the wires from the gas |
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| control valve/thermostat firmly |
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| Secure connections |
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| gas control valve/thermostat. Using a multimeter | |||||||||||||||||||||
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| NO |
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| NO |
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| tripped? |
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| and attempt a relight. |
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| with alligator clip leads, attach the red lead to | |||||||||||||||||||||||||
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| connected to the switch? |
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| YES |
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| the body (copper part) of the thermocouple. | |||||||
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| YES |
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| Attach the black lead to the end (silver part) of | ||||||
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| the thermocouple that connects to the gas control | ||||
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| valve/thermostat. Follow the instruction to light | ||||
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| Are the wires damaged |
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| Is the thermocouple |
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| NO |
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| NO |
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| the pilot and watch the voltage readings on the | ||||||||||||||||||||
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| and/or frayed? |
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| connection loose? |
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| multimeter. After 45 seconds the meter should | |||||||||||||||||
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| YES |
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| YES |
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| read 12 millivolts DC or more. | ||||||||
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| Check for insufficient |
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| Tighten the connection |
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| combustion air. |
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| Replace the gas control |
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| valve/thermostat. |
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| YES |
| Does the thermocouple pass the test? |
| NO |
| Replace the thermocouple. | |||||||||||||||
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Is the
YES
NO
Inspect and clean the
Are there openings for
YES
NO
Install correct size
NO
Are the openings of sufficient size? |
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See “Combustion Air Supply and Ventilation” |
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| Correct size of openings to | ||||
| NO |
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| allow sufficient air. | ||||||
section in this manual for requirements. |
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| YES |
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Is there a furnace/air handler in the same room as the water heater?
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| YES |
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Does the return air duct for the furnace/air handler draw |
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| Contact a local Heating, Ventilation, Air | ||||
its air from a separate location than the water heater? |
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See the “Location Requirements” and “Combustion Air |
| NO |
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| Conditioning & Refrigeration authorized | ||||
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Supply and Ventilation” sections in this manual. |
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| service provider. | ||||
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YES
Is there proper drafting at the draft hood? See “Checking the Draft” section in this manual.
YES
Is the
YES
NO
NO
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.
Refer to the “Maintenance of Your Water Heater” section of this manual for information on cleaning the
Check the water heater for a Flammable Vapor (FV) event. Note: it may be necessary to remove the manifold door assembly to visually inspect the water heater. Reference the “Maintenance of your Water Heater” section of this manual for removal instructions.
Is the igniter wire insulation burnt or |
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| Is the pilot tube |
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| Does the flame | |||||||
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| NO |
| NO | ||||||||||||||
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show signs of discoloration? |
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| damaged? |
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| arrestor show signs | |||||||
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| of discoloration and/ | |
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| YES |
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| or debris? | |||
| YES |
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| YES |
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| heater at the manual gas |
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| valve, then contact Sears Service at |
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THERMAL |
SWITCH |
FIGURE 44.
38