Hot Water/ Central Heating Problems

[kwakaman]

Hi there
I switched my CH on for the first time since the spring two days ago and it worked fine.
Now I noticed that when the HW is on but the CH is off the CH still comes on ...weird. Can somebody offer a solution?
Many thanks
Guy

 

[twgas]

motorised valve passing.

 

[bengasman]

Possibly caused by sludge settling over the summer months, very common problem with open vent

 

[kwakaman]

Thanks for replys, didn't do it this morning HW only. Change the valve it is then?

 

[bengasman]

I'd say find out if the system is sludged up, changing the valve without cleaning the system would be the same as changing your tyre without sweeping the nails of the drive.

 

[kwakaman]

System flushed 3 years ago, new inhibitor every 12 months since and no probs before. Valve is a LLandis and Gry dated 1998 replaced when I moved in then.
PS It is a microbore system!!

 

[bengasman]

Lots of flushes are not performed correctly, microbore makes that even more likely.
To measure = to know.
Plenty inhibitor is great, it prevents further deterioration, but does zilch for existing debris.

 

[kwakaman]

Thanks for that, what's the answer then from the man who knows.

 

[bengasman]

I'd say find out if the system is sludged up, ...

 

[kevplumb]

err it's microbore

hell ben that ain't even a guess

 

[bengasman]