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I no longer use the search function as it is of no use. I put in "Ravenheat" and I have to trawl thru ancient threads to see if there is anything new. The results should come in as newest first! This was a backward step!!

Water hot when CH on but tepid when CH off. Isolate both the feed and return for the CH from your boiler by shutting off the service valve on each pipe. Do not attempt to use the CH wlilst in this state! Then turn on hot tap and see if water gets up to temp. If it does then diverter valve is the...

Schadenfreude ?

V. informative! Thanks!

Why does the central heating system need to be under pressure?

Meeow!!!!!

I just like the idea of fixing things and feeling satisfied at the end of the day. I spose its a throw back to my childhood when I used to love making things.?

Wish I could but theres not too much call for 42 year old trainees!

Really I do!

Thats funny! :)

Please keep us updated Moonmaiden!!

What a generous man you are Poxi!

Its the plate heat exchanger! I have just had excatly the same prob and cured it by taking out the PHE and cleaning out its inards. A better way is probably to get a good strong flush and give the system a good clean out and then replace the conditioner. I replaced the thermisters and...

At least your smiling again Corgiman!

Perhaps its the reactor core that faulty? You nasty boys! :roll:

I have a Ravenheat CSi 85T and the CH works fine. DHW heats up gets hot and then boiler cuts out and then restarts - heats up, gets hot, cuts out etc Have replaced the DHW thermistor but no success. Anybody any idea what next? Many thanks. Vin