Britony combi 80 boiler

Joined
16 Jan 2006
Messages
5
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Location
Hertfordshire
Country
United Kingdom
HAVING TROUBLE WITH THE DHW SUPPLY. WHEN THE HOT TAP IS TURNED ON THE WATER GETS HOT THEN COLDER THEN HOT AGAIN THEN COLDER ETC. ANY IDEAS. i INHERITED THIS BOILER WITH THE HOUSE AND HAD NEVER HEARD OF IT UNTIL THEN. MADE BY "CHAFFOTEAUX ET MAURY"
 
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has it got flame indicator lights for hw? if so do they go up and down. if yes try turn the heat control up to max
 
Sounds like it could be a blocked plate heat exchanger!

Tomy
 
The water temp control is at maximum so thats not it. The blocked heat exchanger (I assume that means hard water scale) seems a possibility and I will look as soon as the weather warms up and I dont need the CH.

By the way is there any accepted method of defurring a heat exchanger?
 
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Whats resistence on h/w thermistor across a 60 degree temp range?

Known to corode on this boiler.

David
 

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