Recent content by Nostawcat

Cheers a replacement it is then, thanks.

Thanks for the reply, not sure how old the unit is, been there at least 13 years so probably had it, just hope it's not a power supply issue.

Many thanks so far, the battery was an afterthought, I didn't think it would affect it, I will certainly give it a clean, just wondered if the newer models are a straight swap without having to change wiring. Just hope it is a unit failure and nothing sinister. I too have a room thermostat but...

I have a Honeywell st699 programmer controlling hot water / heating. It is an older model with the brown backplate. Recently the time on the clock has been randomly changing sometimes twice per day. I will reset it to the correct time and realising the boiler hasn't fired up later I will check...