Combi Hot water temperature fluctuates on shower

[Luker8]

I've got a ravenheat condensing combi providing hot water. It's been running fine but recently when having a shower (not thermostatic just a regular mixer) the temperature will drop for 10 secs or so as if the flame's out then it will come back on for a while.

Any ideas what's causing this?

thanks
Luke

 

[DAJ]

Sounds like a problem I had. It turned out to be the heat exchanger, it was clogged up. It's best removed and cleaned or better still, replaced as you never get all the crap out. Be sure to flush the system before replaceing though or it'll clog again. GOOD LUCK.

 

[Agile]

If it was the plate heat exchanger blocked then it would be quite regulat cycling.

It may well be the flame going out but this is likely to need a CORGI engineer.

It would give a clue if you run a hot tap at the same time as the shower and see what happens.

It would also help us if we what model of boiler you have!

Tony Glazier

 

[Softus]

It may well be the flame going out but this is likely to need a CORGI engineer.

Why? Is the OP a landlord or a tradesperson?

 

[Beans-on-Toast]

errrrrrr I just saw this somewhere..........

http://www.trustedtradesmen.com/forum/forum_posts.asp?TID=6201&PN=1

 

[Softus]

URL

Do you have an opinion, or just a link to those of other people?

 

[Beans-on-Toast]

T O S S E R

 

[Agile]

Water Systems is a retired person who spends all his time telling people on forums that DIY gas work is not illegal.

He is not CORGI registered and he hides his identity. Not someone to be trusted for advice in my view !

What he always forgets to say is that DIY gas work is ONLY allowable if the homeowner is COMPETENT.

It should be pretty obvious to any thinking person that someone who has to ask simple advice on a forum is definately NOT competent!

Tony

 

[Softus]

T O S S E R

Gesundheit.

 

[Softus]

Water Systems is a retired person who spends all his time telling people on forums that DIY gas work is not illegal.

I hope you're more accurate with your engineering work Agile - I've seen contributions from Water Systems on other topics, and I'm also pretty darn sure that he eats, sleeps and cr*ps too.

He is not CORGI registered and he hides his identity. Not someone to be trusted for advice in my view !

Everyone on here hides their identity, other than those who wish to get free advertising via the forum.

What he always forgets to say is that DIY gas work is ONLY allowable if the homeowner is COMPETENT.

I've seen him not forget to say that, so you are, demonstrably, wrong.

It should be pretty obvious to any thinking person that someone who has to ask simple advice on a forum is definately NOT competent!

Well, as a thinking person, my I ask you to declare your reasoning behind that assertion?