In message , John
Rumm writes
RichardL wrote:
Can anyone explain why my expelair has started coming on this year
when the central heating comes on in a morning?
thanks,


Some clues might help...

Where is it? What type? How is it controlled? What is it powered from?

Probably the same reason my PIR controlled front door light comes on
when you use the downstairs toilet........... and switch off the
fluorescent light!

regards


--
Tim Lamb