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

M# 640HORT4 s# H07A090378---MY Pilot Light wont stay lit. I light the Pilot Light turn it on it gets water hot then the pilot light go's out.

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Need a new one.(pilot light)

Posted on May 17, 2010

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Posted on Jan 02, 2017

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1 Answer

I light pI lot and it stays lit burners light and reach temp but then burners wont relight to keep temp unless I tap gas valve..is it my gas valve


A lot of pilot lights have a thermal coupler... the pilot light must be lit for several min to open the coupler so the pilot light will not go out.... the newer systems use an electronic ignition and no pilot light and need power to autostart but the coupler may be gone if you are holding that pilot start button down for several min and the pilot light is still going out..ps.. leave it in pilot mode for several min after initial start up before turning turning full burner operation operation operation operation operation operation operation it will snuff out the pilot light.

May 18, 2016 | Water Heaters

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What pilot light assy. do I need to buy for model# 640y0rt4, water heater ??? please wont stay lit


check that the flame sensor is clean. It would be a stiff piece of wire that would sit right over where the pilot lite is. If it is dirty...it wont sense if there is a flame....and if it dosnt sense a flame....it wont let the pilot lite to turn on.

Jun 03, 2015 | Reliance 606 Series 40 Gallon Natural Gas...

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Sw6p suburban won't stay lit. My 6 gallon hot water heat on my 2007 camper won't stay lit, I go and light the pilot light and it lights but I turn the gas up and it blows out please help


the thermal couple is likely bad .
when you release does pilot stay lit or only as long as you hold the button .

if it stays lit then the thermal couple is good
if it only blows out as you turn on the heat then its draft issue.

May 09, 2015 | Water Water Heaters

1 Answer

Pilot wont stay lit on waterheater. I replaced Thermocouple and that did not fix it. It will stay lit on vacation setting.


Most gas water heater problems can be fixed with yearly service that cleans burner and burner parts, checks gas pressure and bleeds air out of gas line, cleans air intake, and checks for venting and air intake problems.
Open following links for resources:
http://waterheatertimer.org/pdf/Pilot-light-will-not-stay-lit.pdf
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 27, 2011 | Water Heaters

1 Answer

I light the piuolot button and when i let go of the pilot button the pilot goes out does not light burner wont stay lit


When you light the pilot lite you have to hold the button down until it gets the element hot enough to stay lit. If you hold down the button and lite the pilot and let it go right away it will go out. What to do is hold down the button and lite the pilot and continue to hold the buttn down for about 45 seconds to a minute then let it up very slowly and you will see if it is going to go out by the flame getting smaller as you let up on the button. If it does start to get smaller conitnue to hold it again for a few seconds and repeat the process of letting it up slowly. when the control element gets to the right temperature it will stay lit then turn your valve to "ON" and the fire will start up and continue to heat the water.

Mar 15, 2011 | RELIANCE ELECTRIC WATER HEATER

1 Answer

Model: 21v30-7p, pilot wont stay lit


You need a new thermocouple - or maybe the Pilot flame is not lined up properly to the thermocouple? The thermocouple is a "sensor" that is heated by the flame - which in turn keeps the gas supply to the pilot light on. It the pilot light goes out, then the thermocouple no longer "senses" the heat of the flame, so it turns the gas supply off to the pilot to prevent buildup and explosion.

Sep 02, 2010 | Rheem Water Heaters

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

Mar 26, 2010 | Water Heaters

1 Answer

I don't know how to restart my old bosch water wizard 10p, pilot light has gone out.


get a long stick match, a flashlight remove lower inspection cover, find thermocouple and pilot light will be next to it,turn gas valve to pilot light and hold down,stick the match in by thermocouple till the pilot lights and hold valve down till pilot stays lit,this may take a minute or more,then release gas valve and see if pilot stays lit, if not retry,if it wont stay lit,the thermocouple is defective and needs replacement

Jul 12, 2009 | Bosch & Tankless LP Hot Water Heater

1 Answer

Water heater


pilot light assembly needs cleaned - the pilot light is not getting enough gas to stay lit- caused by dirt in fuel line to vavle assembly at the point where fuel comes out - you will have to call for service on this one

Nov 10, 2008 | Water Heaters

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