Water heater keeps dying

Old 10-04-11, 05:52 AM
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Water heater keeps dying

I have a tank storage water heater that the burner keeps going out. It seems to me that the blower or vacuum on top of the tank is on 24/7. If I turn it off and reignite the pilot then it works again. Any suggestion is much appreciated.
Old 10-04-11, 06:17 AM
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What is the make and model of the water heater?

Most cause of fan running is the pressure switch circuit remains open longer than 5 seconds after the blower is energized.

Below is the troubleshooting steps from an AO smith power vented model. ( Yours may be different, but am just trying to give you an idea.

1 Ensure the blower is running - check for 120 VAC to
the blower when the heating cycle begins, check the
wiring. If the control does not energize the blower -
replace the Intelli-Vent™ control. If the blower fails to
start when energized - replace the blower assembly.
2 Ensure the air pressure switch sensing tube is
properly connected - not kinked or damaged.
3 Check continuity of vent temperature limit switch -
replace switch if contacts remain open under 160°F.
4 Ensure the correct size of vent pipe (2”, 3”, 4”) was
used per the installation manual for vent length.
Ensure maximum number of elbows or equivalent
feet of vent pipe has not exceeded maximum limits.
5 Ensure there are no obstructions in the vent pipe.
6 Check air pressure switch performance - check
pressure with a digital manometer - check continuity
of contacts. (see service note in left column) If the
switch proves defective - replace the air pressure
switch and/or the blower assembly as required.
7 If air pressure switch performance test results prove
the air pressure switch is working properly and error
code 4 persists - replace the Intelli-Vent™ control.

Mike NJ
Old 10-04-11, 07:01 AM
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Thanks for the help. I'll try to get the make and model. Recently I had some company came over and wrap the whole tank and now I can't see the make and model anymore.

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