I arrived to service a boiler …… As always I asked ‘hows it been behaving?’……… the response was somewhat negative……. the impression i got was it was a little cold……….

the boiler seemed to run fine, and all checked out………. gas rate ok, co/co2 ok, flow good, temperatures good, ………….. no funny noises……..

i checked the rads and flow was good and all were heating well……

I followed up my ‘behaving?’ question with a few more – what / when /how……… but the consensus seemed to be ‘cold all the bloody time’………..

hmmmmmmmmm

clicked the room stat up and down a few times while considering the situation………….

and looked down……..

look closely

errrrrrrrr…………. thats not a room stat! its a frost stat! temperature range -15 degrees C to +10 degrees C…………….

that will be the problem then!

However, its been in 5 years ! and serviced every year! how did no one notice? and who was the retard engineer who thought a frost stat would be ok as a room stat?