Question about RTO W4 A.O Smith Gas Hot Water Heater Draft Inducer

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The pilot light on my hot water heater keeps going out

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If you have a blower and electronic gas control on your AO Smith water heater, then reading the manual for your specific product is essential for troubleshooting the problem.

As you know, tank-type gas water heaters require periodic inspection and cleaning of burner parts and combustion chamber.. The manual is important for giving instructions and advisories to the homeowner and technical specialist.

If you have ordinary direct vent water heater with mechanical gas control the following link has some troubleshooting resources that might help:
http://waterheatertimer.org/How-to-install-gas-water-heater.html#clean

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Posted on May 19, 2011

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1 Answer

Pilot light is working but cant get heating or hot water


If your pilot is lit, and you have valve turned from pilot to ON, and thermostat is up on warm or hot, and you still don't have main burner on, then you have bad gas valve (the square thing with temperature and on/off/pilot). These unscrew from water heater and can be replaced, but keep in mind that they go directly into tank, so shut off water and drain unit first!

Jan 06, 2015 | Water Water Heaters

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Why does my pilot light keep going out when heating is on ?


Water heater and house heater are sharing the same vent?
Then vent is bad, and heater is pushing combustion by-product down into the water heater and blowing out pilot.
Call technician immediately to avoid CO poisoning.
Look for black soot on top of water heater... test the vent:
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#vent

Read about Carbon Monoxide poisoning: symptoms and first aid
http://waterheatertimer.org/Is-natural-gas-clean-burning.html

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Oct 08, 2014 | Water Heaters

1 Answer

Pilot light keeps going out during hot days


Solution is probably better ventilation to gas water heater.
On hot days, heat and lack of ventilation can cause pilot outage.
Hot air causes oxygen molecules to move farther apart, and combustion is no longer supported so pilot goes out.

Open following links:
http://waterheatertimer.org/pdf/Attic-Ventilation-and-Pilot-Outage-in-Gas%20Water-Heaters.pdf
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot

Jul 04, 2011 | Rheem Water Heaters

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I have a Rheem PG50T9A gas hot water heater. We had hot water this morning. When I came home the pilot light was out and won't stay lit. Any ideas?


Hopefully just the thermocouple. The thermocouple is the small rod right next to the pilot light. The flame on the pilot heats up the thermocouple and keeps the gas valve on. You can replace it yourself. The thermocouple will be connect by a small nut on the underneath side of the valve, and you will have to pull the thermocouple out of the pilot assembly. Not an expensive part, you can get it at any hardware store. Hope this helps you .

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1 Answer

Pilot keeps going out after it cycles a few times


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1 Answer

M# 640HORT4 s# H07A090378---MY Pilot Light wont


Hi,
First thing is to replace the thermoscouple. When you light it you get it a bit hotter then normal. You turn on the main burner which keeps it hot. Then when it goes back to just pilot the flame is not hot enough to hold the pilot valve in.
Replace the thermocouple and you will be fine...

heatman101

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2 Answers

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Probably a bad solenoid in the gas valve. Higher voltage of a new thermocouple keeps it open longer but it still fails over a period of time. Look into a new gas valve for the water heater.

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If the thermocoupler is defective the gas to everything is shut off. The coupler is the bulb that sits ib the pilot flame If it doesn't heat up it will sense no pilot and shut the gas off. They don't cost much and are easy to change. Good Luck, Ned

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