Valliant Combi Boiler

[efarraud]

Hi

My valliant boiler is coming up with a F.22 message. We have no heating or hot water.

We had a plumber come over and spent all morning on the boiler (to say that he could only temporarily fix the problem - but we would need to 'flush' the sytem out. Anyway, after he left the boiler ceased to work.

Any comments = would be gratefully received.

BW

 

[g60bv]

what model of boiler is it.

 

[Agile]

Its a Vaillant 824 or 828 !

The code is for a lack of system water flow.

Its measured by the temperature sensors and they can give problem trips if they are a little off tolerance.

The earlier boilers were too sensitive and later PCB software has been modified we are told.

Officially the poor flow is caused by a blocked or weak pump, dirt or air or a blockage in the system.

What the actual cause is in your case is I dont know without being on site. Clearly the "plumber" you had there is rather less than competent! I would suggest you call a boiler engineer!

Tony