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 > Wife making cookies...RV oven keeps going out...

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groundhogy

PA

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Posted: 12/20/18 02:29pm Link  |  Quote  |  Print  |  Notify Moderator

I am rapidly getting into trouble each time we have to light the oven again. Even though its not my fault.

Light the pilot light and it stays on ok.
Turn knob and burner lights and oven heats ok.
At some point, the oven ceases to be lit. (maybe in the cycling procecess?)

I have observed that the pilot seems to be very happy by itself. Seems to tell me that the thermocouple is correctly sensing the pilot is on.

I have manually cycled the call for heat on and call for heat off several times by turning the temperature knob way up and way down.
I have not seen the burner turn off by itself doing this.

help..

2oldman

Ca

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Posted: 12/20/18 02:35pm Link  |  Quote  |  Print  |  Notify Moderator

Assuming all your other gas appliances work properly, I guess you can rule out gas issues like regulator.

That's about all I know.. my 15 yo oven has never failed to work. I have no igniter, I manually light it from the back with a torch. Good luck.

groundhogy

PA

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Posted: 12/20/18 02:42pm Link  |  Quote  |  Print  |  Notify Moderator

Well, there must be something that senses oven temperature, and there must be a gas on/off relay?

But the gas relay has to turn the oven burner on and off while leaving the pilot on.

Seems like the oven temperature regulation circuit would be separate from the pilot light circuit?

naturist

Lynchburg, VA

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Posted: 12/20/18 03:07pm Link  |  Quote  |  Print  |  Notify Moderator

Oh, man, you really know how to annoy your wife, don't you? It is, of course, all your fault, and if you don't get it fixed NO LATER THAN YESTERDAY, you'll spend the night outside with the pooch.

I do wish I could hazard a guess about the problem, but all I know about such matters is the thermocouple that keeps the pilot lit. And it does seem that you do not have that issue. I will cross all my fingers and toes for you, wish fervently for somebody to come on here with a simple/cheap solution that actually works and can be implemented in minutes. Good luck, buddy.





dougrainer

Carrolton, Texas

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Posted: 12/20/18 03:29pm Link  |  Quote  |  Print  |  Notify Moderator

The usual cause of pilot stays lit and over burner comes ON and then fails to come back on to keep preset temp after going OFF once preset temp is reached is----Bad Thermostat, which regulates both burner and feeds the pilot. Doug

ktmrfs

Portland, Oregon

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Posted: 12/20/18 03:39pm Link  |  Quote  |  Print  |  Notify Moderator

when you say the oven ceases to be lit, is the pilot still on or does the pilot also go out?


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wa8yxm

Wherever I happen to park

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Posted: 12/20/18 03:54pm Link  |  Quote  |  Print  |  Notify Moderator

WHat I am about to say applies to both Gas and electric ovens. (part 1)

The main burner (heat element on an electric) does not remain on full time. It cycles on and off.. on a gas oven the pilot remains on so it can re-light the main (Why it is called a pilot) but the main burner/heat element will shut off and come back on as needed.

This assumes proper operation

on an RV oven.. USE A Thermomemter to check cause atwood thermostats are the most inaccurate devices I've evern seen (mine is 50 degrees off)

Page 2:
is it possible to design a proportional Valve/switch so that the main burner is "Turned down" but for gas it is very costly. Very Very costly.

For electric it would only cost a few dollars per oven. but .. why? You don't need 1/2 of one degree or tighter tolerance.

For some electronic applications 1 degree difference can be "Big" and that is about the only place they do the tight control stuff.


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trailerbikecamper

eastern Canada

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Posted: 12/20/18 04:05pm Link  |  Quote  |  Print  |  Notify Moderator

On our gas oven at home we had the exact same issue. It was a relay that senses the oven temp. Ours would do exactly what you described. When first starting it would come up to the temp called for, but the burner would not come back on without turning the oven completely off.

Went to the local RV parts place, bought a new sensor and replaced it. The sensor/relay on our was under the oven where the burner sits. Once I had the part it took about 30-40 minutes to replace and get the oven working again.

The part itself wasn't expensive, maybe about $15CDN.


Dan

YC 1

Yuba City Calif./ Auburndale Florida

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Posted: 12/20/18 04:51pm Link  |  Quote  |  Print  |  Notify Moderator

You may be able to remove the pan over the heating element to get good access to the pilot flame. In any case be sure the flame is properly aligned below the thermocouple. Mine was misaligned and after adjustment it worked fine.


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ScottG

Bothell Wa.

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Posted: 12/20/18 05:12pm Link  |  Quote  |  Print  |  Notify Moderator

YC 1 wrote:

You may be able to remove the pan over the heating element to get good access to the pilot flame. In any case be sure the flame is properly aligned below the thermocouple. Mine was misaligned and after adjustment it worked fine.


Good advice.
If not an allignment issue, place some rags around the area of the thermocouple and blast it liberally with carburetor cleaner. It will disolve the carbon on the thermocouple that is insulating it from the heat of the flame. You could also try to brush it clean with a brass brush but its hard to get close enough to the TC.
Thermocouples rarely die, they mostly get dirty and I have fixed several of these ovens with just a cleaning.

* This post was edited 12/20/18 05:28pm by ScottG *


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