BIAS 24S CH WORKS FOR A FEW MINS AND SWITCHES OFF

[tsolo73]

HELO GUYS I AM HAVING MAJOR PROBLEM WITH MY BOILER WHEN CH SWITCHED ON WORKS FOR A MINUTE TO 3 MINS THEN THE FLAME GOES OFF. WHEN DHW IS USED WHILST CH ON FOR THOSE FEW MINS CH WILL STOP WORKING AND DHW WILL NOT WORK. DHW MODE WORKS ON ITS OWN BUT WILL STOP WORKING WHEN CONTINEOUSLY USED. CANNOT HAVE DHW FOR A WHILE AFTER CH FAILURE. HAVE TRIED REPRESURISING VIA FLEX TUBE BUT PRESSURE DROPS SLOWLY AFTER A COUPLE OF HOURS. PLEASE HELP BEFORE THE WINTER BITES HAVE GOT NO CH. BLESS YOU!

 

[Agile]

Is this really a 24S with three knobs?

It sounds as if your boiler has several problems including a leak and being sludged up.

I would recommend a competent boiler engineer.

They are completely repairable but choose someone who repairs boiler as otherwise they will all just want to fit a new boiler as there is more money in it for them!

Tony

 

[tsolo73]

THANKS TONY, YES THIS A M90F 24S BIASI BOILER. ITDOES HAVE TWO NOBS THOUGH.

THANKS FOR POSTING. AN OTHER SUGGESTIONS PLEASE??

 

[Agile]

No, its NOT a 24S with three knobs!

Its an M90 with two knobs.

They are a later model but far less reliable.

The system flow switch is not always very reliably activated.

Tony