Re: re Re: Seat heater switches

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <A955A4BCA8F8D011AE1C0000F804A88A0192BEEB@EMSS05M02.ems.lmco.com> "Smith, Kirby A" writes:

> The seat heaters in my 90q work via a 6 position switch that is, internally,
> a circular carbon track that moves relative to a wiper.  I believe this acts
> as a  potentiometer to determine a "power" or voltage level to the seats,
> although I haven't measured the exact effect.  When the carbon track to
> wiper connection becomes marginal, the controlling relay chatters.

Surely the 'half-heat' setting would then result in the switch getting
as hot as the seat?

I'm sure the switch only provides a reference resistance for comparison
with the state of the thermistor.

--
 Phil Payne
 Phone: 0385 302803   Fax: 01536 723021
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