Protech Systems FasNSeal FSWMKE4 4" Vent Kit for Wall Mounted Boilers & Wat - Answered Questions & Fixed issues
Biasi too hot
check pump is running ok..if not replace it the pump, if pump is ok then u will need to descale boiler put in system by rad or if not combi then put in open vent tank make shure its the small tank also make shure the valve in tank is not stuck
Sabre boiler
Vent unit to exterior wall. 10ft from any window or door
Protherm
What is the make and model of the boiler?
Protherm 100EC boiler not firing up
You likely have a flame sensor problem.
If you can wath the ignition proccess, see if you ever notice a flame. If yes, and it then shuts downm, you have a flame sensor failure, replace the sensor and clean the flame burners and orifices.
If no flame at all, then your ignitor is failing, or you are not gatting gas to the ignitor.
Baxi duotec is heating radiators but not tap
Sludge / furring possible in primary part but not if the ch & flow through hot tap are ok More likely it's the diverter valve. The rubber diaphragm inside is perished / holed. Replace
Boiler coming on,on its own
Sounds likely. But check the timer selector switching [on/off/24hrs] & if you have a room thermostat wired in
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