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Posted by terry on October 23, 2009, 12:52 am
> jeff_wisnia wrote:
> > dpb wrote:
> >> don &/or Lucille wrote:
> >>> Antone come across this before? One of the small elements wont turn o=
n
> >>> when dial is turned on 1 but needs to be put on three before heating
> >> Yeah, need new control--they are simple rheostats in essence and can
> >> develop dead spot.
> >> --
> > I concur, but they sure aren't rheostats. If they were they'd dissipate
> > as much heat as the element itself when set for "half heat", and would
> > get hotter than hell themselves.
> > I'm remembering how they worked from many years ago. Back then they wer=
e
> > simple pulse width modulators based on thermostatic action mechanically
> > modified by the setting of the temperature control knob.
> > Do they still work on that principle guys?
> > Jeff
> Hi,
> No.Bi-metal based mechanical. control is gone. Now it is electronic like =
light
> dimmer.- Hide quoted text -
> - Show quoted text -
Interesting. We still use old stoves, and have only very occasioanlly
replaced one of the controls.
But yes the older controls do click in and out when set to anything
other than maximum.
Agree; in the case of this OP replace the control.
Once or twice in some 50+ years have seen more sophisticated control
that incorporate a temperature sensor tube that feeds back the
temperature of the heating element to the control itself. Very rare
IMO.
Not familiar with newer solid state/electronic controls but guess they
are similar to a heavy duty light dimmer-switch? Some form of triac
maybe?
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> dial is turned on 1 but needs to be put on three before heating