Our house had a new ravenheat B&Q combi special fitted about 5 yrs ago when we bought it. Always has been a pain in arse with various problems, but currently have a odd one....

Central heating side is fine, Hot water though only get luke warm no matter how high you have setting, you have to throttle tap back by over half to get it hot enough to wash in etc, Baths are never hot enough.

Any ideas??????

 

diaphragm on the changeover valve has rotted/split.

 

sounds like divertor valve

 

I had a similar problem with my combi,same thing,if you open up the hot tap too much it would run colder.I was told it was a heat exchanger,if the hot tap was open too much the water flow was too fast going through it for it to heat up.Also recently if i was running hot water the rads came on,that was a faulty diverter valve.
Good luck.

 

IS IT SUMMIT I COULD CHANGE, CAN PUT MY HAND TO MOST STUFF.....

oopsss caps lock

 

It will be either the divertor valve letting by or the hw heat exchanger.

 

I have had a Ravenheat boiler fitted since 2003 and I am on British Gas' service plan. I was told a couple of years back when I joined that it would probably be heaps of trouble but apart from having one valve changed, its been okay. They aren't a B&Q boiler are they? I know they are made at a place in Morley, well, they were.

 

what am i looking at for one changing roughly???

 

that's what mine was, but i had no hot water at all - the diaphragm was split really bad tho

 

What, for the parts, or to do the whole job?

 

whole job

 

Couple of hundred quid probably.

 

do it meself if it is lol

 

LOL.

It aint rocket science.

 

If the boilers coming on but the Hw is only luke warm, Its probably the Plate H/exchanger blocked, Needs stripping and cleaning

 

Jon ive had a feel and when it fires up (which is getting tempermental) the radiator system is getting hotter than the hot water system so looks like diverter

 

What so your radiators come on when its on hot water only? If so then its prob divertor valve passing