Isar HE 35 heats central instead of warm water?

Hi Again
You are right. After cleaning the divert valve all starts working properly but now again heats central instead a hot water, so will buy new valve. I'm from Poland so that is a little delay with delivery infortunately. Also new problem occur it shows DHW thermistor malfunction, so should I replace both of them some time? Thanks for help.

Piotr
January 2014

from your description the divertor valve still seems stiff

i would personally remove & fit a new one

this is a job for a qualified gas engineer

you are not qualified to do this job but at least you now know what the problem is & which part needs replacing

you just have to shop around for a reasonable quote

Q
January 2014

I did as you advice. The head looks like working. I see that the shaft of the valve was stuck and needed a lot of force to move. So I did push and pull few times adn use penetrating grease to make it work. Now all looks operational but stil the problem persist. Boiler is preheating "t" and it heats a central heating instead. Maybe that valve is completely stucked inside? I do not know but something busted iside? Hmm, now I'm little confused. Any ideas?

Piotr
January 2014

divertor valve 174200
sticking or seized
repair or replace

http://www.ebay.co.uk/itm/ideal-isar-diverter-valve-cartridge-repair-kit-part-no-174200-original-/280753479627

Q
January 2014