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If your gas oven is not working or not heating then you need to check this out. Today?s gas ovens
are not often do not use the simple thermocouple with a pilot to prove
the flame anymore. They have a much more complicated method of lighting the burner and proving the flame.
The use of electric igniters has become the standard for many ovens today. The thermostat
calls for heat, power is supplied to the igniter, then after a certain
amperage draw on the igniter, the gas valve is energizes to open and
allow gas to flow starting the flame. As long as the amperage draw on
the igniter is high enough then the gas valve stays open till the
thermostat is satisfied.
Sometimes the igniter will crack and no
current will go through and the igniter will not even heat up or glow.
Sometimes the igniter will wear to the point where it will still heat up
and glow, but the current draw will not be high enough to allow the gas
valve to open. This creates a confusing situation where you look into
the oven and see the glow from the igniter, but get no heat because the burner never lights
up. If this is the case then you will need to replace the igniter even
though it seems to be okay. The only way to know for sure is to know
what the current draw requirements are for that gas valve and to have an
amp meter to check the current draw.
Most of the time the problem will be in the igniter, and not the gas valve.
Gas valves can go bad, but that is the case in only a very small amount
of the situations. It is a pretty safe bet that if you have a problem
with you gas oven lighting that you have a problem with your igniter.
You can get a full manual and installation instructions:
http://kitchen.manualsonline.com/manuals/mfg/smeg/a12.html
But even though it is a gas range, for the ignition to work correctly, it has to be wired properly.
You also have to turn the control on the burner all the way up, to the light position.
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