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Ed Sirett
 
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On Sat, 09 Oct 2004 11:32:41 +0000, Ian Stirling wrote:

Ken Knott wrote:
i have just fitted a resettable immersion heater thermostat. It has a
dial to select the temperature and a reset button. Since you can
select the temperature using the dial i don't really understand what
resettable means in this context. can anyone explain? thanks.


In case it gets too hot for some reason, you can press the reset button
when the overtemp thermostat cuts it out.
Otherwise for one with a thermal fuse, you'd need to replace it.


I think, the idea is that the reset button requires non-user
intervention (the cover must be unscrewed to gain access). So when the
main thermostat welds
permanently on as they can and do the heater will stop working until
someone (presumeably competent) fixes it and resets it.

There was a case of a fatality the other year due to a stuck immersion and
a stack of other problems.

--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html