On 17/12/2020 14:04, Dave Liquorice wrote:
On Thu, 17 Dec 2020 13:45:20 GMT, Chris French wrote:

That's the gist of it, but This one doesn't have thermocouple. The spark
electrode acts as a sensor for when the pilot is alight. The PCB then
opens the main gas valve.

It hasn't lost it's earth (as in real) has it? Don't know the
mechanisum but there are post mentioning boilers not starting when
run from a genset that doesn't have neutral tied to earth somewhere.

That's for ones that use flame rectification to sense ignition. Even
when that mechanism fails the main burner will still light, but then it
fails to "prove" and the controls shut it off again.


--
Cheers,

John.

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