Honeywell Cm07 and Potterton 40 Boiler

Joined
30 Jan 2012
Messages
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Location
West Midlands
Country
United Kingdom
Hi there,
Im hoping somebody can help me

I recently upgraded our old analog thermostat for the Honeywell Cm07 digital Thermostat, and everything works great

Other than......

Say once a week, we notice the room temp drops and look at the thermostat, room temp is say 18 deg and is trying to get to 21 degrees

The little flame is lit, so I assume its sending a signal to the boiler to light

The boiler isnt doing anything, infact its stone cold, the red standny LED is lit, not flashing or anyhting though

If i turn the boiler off an back on at the mains all works again for another 5-7 days

Could someone please shed some light


Mike

p.s
I will confirm the boiler model number, as im at work, so waiting for the missus to get back to me
 

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