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On Mon, 15 Aug 2005 07:05:14 GMT, wrote:

In sci.electronics.repair DaveC wrote:
I presume the way 3 heat settings are accomplished is through the
use of 2 different wattage heater elements. For example, Low =
1000w element; Medium = 1500w element; High = both elements.

This may be right. Another way it can be done is with two equal
wattage elements. Low = one element across 120 V, medium = one
element across 240 V, high = both elements across 240 V.

This is wrong. 120 V across both elements in parallel will be half
the wattage of 240 V across a single element.

More common in electric ranges
that have off-1-2-3-4 pushbuttons instead of "infinite" heat
controls, but possible in a dryer.

I hated those systems. A quick way to spot a dodgy switch is with an
inline wattmeter. Just cycle through the heat selections and watch
the meter.

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--
-john
wide-open at throttle dot info