On 29/06/2020 10:46, Dave Liquorice wrote:
On Sun, 28 Jun 2020 22:54:20 +0100, John Rumm wrote:

So either a lockout / fault condition preventing it proving and firing,
or something like a valve problem - either not getting an instruction to
open, or not responding.

Or the boiler is controlled via a microswitch on a valve and the
microswitch has failed or the valve is responding but is gunked up
and not opening enough to operate the switch.

If its a conventional wiring with the microswitch firing both the pump
and boiler, then it must be ok if the pump is running. Likewise if the
boiler controls the pump, and its running, then the call for heat must
be getting as far as the boiler.


--
Cheers,

John.

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