Whirlpool UG1J4040T3NOV User Manual

27

Have you bled all the air 
from the pilot tube and 
gas supply line?

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. 

Section A: Pilot light will not light.

Section B: Pilot light will not remain lit or repeatedly goes out.

Check for insufficient combustion air.

Are there openings for 
make-up air to enter the 
room?

Are the openings of sufficient size? 
See Combustion Air Supply and Ventilation 
section in this manual for requirements.

Is there a furnace/air handler in the same room as the water heater?

Does the return air duct for the furnace/
air handler draw its air from a separate 
location than the water heater? See the 
Location Requirements section and the 
Combustion Air Supply section.

Is there proper drafting at the 
draft hood? See Checking the 
Draft section in this manual.

Remove the burner door 
assembly. Is the flame-trap and 
burner free from debris due to 
excessive lint, dirt, dust or oil?

Install correct size make-up air openings per the 
Combustion Air Supply and Ventilation section in 
this manual.

Refer to the Use & Care Guide section 
of this manual for information on 
cleaning the flame-trap and burner. 

Contact a local Heating, 
Ventilation, Air-Conditioning 
& Refrigeration authorized 
service provider.

Is the gas turned on?

Check the manual gas shut-off valve to 
see if it is in the open position, if it is open 
then contact the gas utility company.

Is the igniter producing a 
spark?

Follow the Testing the Igniter System 
instructions in this manual.

* This procedure requires the removal of water heater components.

Is the thermocouple securely 
connected to the gas control 
valve/thermostat?

Make sure the thermocouple is securely 
connected. Finger tighten then give a 
additional 1/2 turn with a wrench.

Is the pilot tube and/or orifice 
free from dirt and debris?

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.*

Is the pilot free from dirt and 
debris?

Follow the Cleaning the Pilot Assembly 
instructions found in this manual.*

Is the pilot protected from cold 
drafts that could prevent it 
from lighting.

Eliminate any drafts.  See the 
“Site Location” instructions found 
in this manual.

Check the water heater for a Flammable Vapor (FV) event. 

If the flame-trap show signs of discoloration, shut-off the gas supply 
to the water heater at the manual gas shut-off valve, then contact 
Customer Service at: 1-877-817-6750.

Is the pilot tube and/or orifice 
free from dirt and debris?

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.*

Is the pilot free from dirt and debris?

Follow the Cleaning the Pilot Assembly 
instructions found in this manual.*

Correct size of openings to 
allow sufficient air.

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.

Is the thermocouple fully 
seated in the pilot bracket?

Push the thermocouple 
forward until it is fully seated in 
the pilot bracket and retest.*

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.*

Replace the gas control 
valve/thermostat.*

Does the thermocouple pass the test?

Replace the thermocouple.

Remove the burner door assembly. Is 
the flame-trap free from dirt or debris? 
See “Removing the Burner Door 
Assembly” section of the manual for 
removal instructions.*

Clean the flame-trap 
with a soft bristle brush 
or vacuum cleaner.

Does the flame-trap show signs of discoloration. 

Shut-off the gas supply to the water heater at 
the manual gas shut-off valve, then contact 
Customer Service at: 1-877-817-6750.