how does the thermostat control the gas valve when tempreture overshot?
the reason i asked for the upper gas burner(element)is bcos some baking need
upper tempreture more than lower temppreture,in electric oven you can have
seperated upper or lower element,but in gas oven case,how can we get it?
I was told that industrial/commercial gas oven does have upper and lower
burner element,is that right?cos i haven't seen one like that before.
i feel that gas oven tends to generate more moisture(gas?)than electric
type(tends to be dry type)and resulting of different
quality for the baked product.
is the any book or web site i can learn more about gas oven?
thanks

"Pennyaline" > wrote in
message ...
> "Alan" wrote:
> > Thanks for your advise:
> > my gas oven heat up to the tempreture according to the preset heat,but
> > sometimes when it overshot,the gas burner still fire
> > and never went down,i wonder is the thermostat still in proper function?
> > where can find the thermostat from the oven,where can i get replacement
> > parts if it is not working.
>
> The temperature probe is in your oven attached to (probably) the rear wall
> near the oven's ceiling. When the thermostat fails, it is likely due to a
> failure of the probe. You can get replacement parts, but it's best to go
> through a good appliance dealer or repair service to get the work done.
> Sometimes, it's more efficient to replace the stove.
>
>
> > there is no upper burner(upper fire)for this gas oven,can i make one for
> > myself?how to do it and where can i get parts?
> > any web site can teach to diy a gas oven?
> > thanks
>
> Electric stoves have upper elements in the oven box that serve as
broilers.
> Gas stoves have broilers in the compartment below the oven, where the fire
> for the oven is already situated. Sometimes the broilers are at the top of
> the stove, where the gas units of the cooktop have been designed to do
> double duty. I can't imagine why else you would want an "upper burner" on
a
> gas stove.
>
> Would I DIY a gas stove? NO! Your gas appliance connections might have to
> pass a safety inspection before the gas supply can be turned on, and if
> you're jiggering your own appliances you may be setting yourself up for
gas
> leaks or explosion and fire risks.
>
> >
> > "Jenn Ridley" > wrote in message
> > ...
> > > "Alan" > wrote:
> > >
> > > >i'd like to know how's the gas oven works?any web site or someone
could
> > give me the infos?
> > > >thanks
> > >
> > > A gas oven works by burning natural gas (or propane, if it's a propane
> > > stove).
> > >
> > > When you turn on the oven, a valve opens, and the gas starts flowing.
> > > An electric ignitor lights the gas. A thermostat tracks the
> > > temperature, and when it gets high, the gas turns off, and when the
> > > temperature gets low, the gas turns back on again (just like a
> > > furnace).
> > >
> > > Some older gas ovens have a pilot light instead of an electric ignitor
> > > (a small flame is always burning below the oven floor, and when the
> > > gas is turned on, it ignites). Some really old gas ovens don't have
> > > any kind of internal ignitor at all, and need to be lit with a match.
> > >
> > > jenn
> > > --
> > > Jenn Ridley
> > >
> >
> >
> > "barry" > wrote in message
> > et...
> > Pretty simple device.
> >
> > There is a piece in the oven that measures temperature, call it a
> > thermometer.
> > There is a connection between the thermometer and the gas supply, the
> gas
> > valve.
> > There is a temperature control knob on the front.
> > There is an on-off method built into the oven. This is controlled by
> the
> > control mechanism.
> >
> > Here's how it works.
> >
> > You set the temperature and turn the oven on. Say you set it to 350F.
> >
> > The gas valve opens and the gas ignites, whether by pilot light,
> > electronic ignition or match.
> >
> > The oven burns some gas and the oven heats.
> >
> > As the oven heats, the oven thermometer measures the temperature and
> > reports that back to the control mechanism.
> >
> > The control mechanism is set to respond to a range around the
> temperature
> > you set. It will go on at a temperature slightly below what you set and
> off
> > at a temperature slightly above the temperature you set. In this
> instance,
> > let's say that it is set at 10F above and below the temperature on the
> knob.
> >
> > As the oven heats, the thermocouple reads the temperature. Then the
> > temperature gets to 350 + 10F, it will stop heating. As the oven cools,
> it
> > will continue reading the temperature. When the temperature gets to
350 -
> > 10F, it will turn back on and heat until it hits 350 + 10F. And so and
so
> > on and so on.
> >
> > The oven is never really "at" 350F except in passing through on the
way
> up
> > and down, but it averages 350F over the course of the baking period.
> >
> > Barry
> >
> >
> >
>
>