Ravenheat combi , luke warm water

[makumgav]

Hi All, hope some one can help before the snow falls .....
i have a Ravenheat combi not sure of the model , looked all over it but no numbers etc, its about 7/8 yrs old and all of a sudden the water is intermittently hot then cold ,te CH s fine, i can run the water one day and its red hot next freezing cold ....
i turned the water control right up tonight and turned the CH off and i got hot water , the boiler gas flares up when i turn the water on but its still luke warm, the water is primed at 2b, if i run the tap slow it makes no difference, i cannot find any summer/winter switch which iv read about, any ideas
Cheers Gav

 

[diamondgas]

Hi Gav & :welcome:

Sounds like obvious issues with hot water temp control Alas not necessarily a straight forward remedy!

Could be simple as a sensor or as complex as flow restrictions... Best bet is to get someone to have a look at it B4 it fails all together :IMO

Post a request on the "In need a plumber/gas engineer" Forum with some basic area and look out for a PM

 

[abdul1977]

Hi mate seem to me secondary heat exchanger must be sludge built up.Need to be replaced or cleaned up.

 

[warrington]

You could have thermistor,heat exchanger ..problem. Same advice as diamondgas, you can't do anything, you need engineer to look at it. Post a request and anywhere close will answer.

 

[makumgav]

thanks for that lads , doesn't sound like a quick fix , got a lad in the village who works on combis etc , will just ask him to take a look ,
thanks again and will post the remedy when sorted , Cheers Gav