Biasi 24s is overheating on central heating and cutting out after 85c
Temp thermistors showing resistance around 11000 when cold
Initially it was sometimes blowing out of the expansion pipe
However not recently, but still needing a top up almost every time
cannot find any leak or signs of whatsoever and its had a lot of top ups most walls are exposed plaster so it should show.
Flummoxed... I've tried lowering the rad dial and had no response still heading up to 85+ even on summertime setting...
Could this be the PCB ignoring what the thermistors are telling it.... or something else
All rads throughout are getting very hot and no signs of obvious blockage, no air in system.
Ideas please
Ah, just found now (seems recent development) that the time is now not turning it off neither...
1 So timer not turning off
2 Rad dial setting not stopping it heading north of 85c
Temp thermistors showing resistance around 11000 when cold
Initially it was sometimes blowing out of the expansion pipe
However not recently, but still needing a top up almost every time
cannot find any leak or signs of whatsoever and its had a lot of top ups most walls are exposed plaster so it should show.
Flummoxed... I've tried lowering the rad dial and had no response still heading up to 85+ even on summertime setting...
Could this be the PCB ignoring what the thermistors are telling it.... or something else
All rads throughout are getting very hot and no signs of obvious blockage, no air in system.
Ideas please
Ah, just found now (seems recent development) that the time is now not turning it off neither...
1 So timer not turning off
2 Rad dial setting not stopping it heading north of 85c
