Firebird Popular 90 - Thermostat doesn't seem to be working

jimf

https://www.boards.ie/discussion/comment/123928091#Comment_123928091

it comes with a prefitted frost stat and a permanent live terminal

but its quite common around my area not to see them wired in usually on replacement boilers

Cuttlefish

Evening folks, So update on my original issue/ concern - The thermostat on the boiler itself is working as intended, we checked it Saturday and to "speed up" the process of checking unplugged the pump so what wasn't circulating and after a short while the boiler did shut off. So peace of mind that it is working and next to work on getting a room thermostat set up

Any suggestions with regards to this would be welcome. Appreciated the replies and I learned quite a bit about the thermostat which is always good.

John.G

https://www.boards.ie/discussion/comment/123928700#Comment_123928700

Which stat is working, the control stat which you said originally wouldn't shut down the burner at 60C, or was it the hi limit stat that had to be reset?.

Cuttlefish

https://www.boards.ie/discussion/comment/123928832#Comment_123928832

The control stat John

John.G

The only explanation so as to why the burner never cut out is that the boiler output is less than the heat emitted by your 8 double + 1 single rad.

Iderown

https://www.boards.ie/discussion/comment/123926913#Comment_123926913

The very ancient boiler was a wood pellet burner. It had assorted items which required a permanent live supply - along with a switched live. The wiring is partially underground and probably nearing the end of its life. This may be similar to situation of original poster.

Anyway, the wiring will be replaced (overhead, conduited) tomorrow.