:x: :x: boilers :x: :x:

 

my small Puma combi boiler has a problem

 

Heating - works fine :D

 

but....

 

when you turn on the hot tap in the bathroom hot water comes out!!!

 

Shock Horror I hear you cry

 

the problem happens when you turn the Hot tap OFF

there's a clanking in the pipes and the pilot light in the boiler goes off

 

can anyone tell me why???

 

can anyone tell me how to fix it??

 

i called a plumber and he cleaned and hoovered the boiler charged a fortune and buggered off

no difference

:headvswal :headvswal

 

thanks

 

Paul

All combi boilers work on a seald and pressurised heating circuit,

first of all check to see how much pressure is in the system, this is done by

checking the pressure guage on the boiler, it will be in a prominant place,

this guage should read around a bar. If the pressure in the heating side is too low the boiler will go out on overheat ie the pilot will shut down.

this is a basic cause but the real problem is more commonly the diverter valve malfunctioning, that is the valve which switches from heating to hot

water.

cheers

just going for a look now

...the real problem is more commonly the diverter valve malfunctioning, that is the valve which switches from heating to hot

water.

And can I add that another big problem is many engineers being cr*p? We just had 15 (yes - 15) visits from British Gas to fix our Vaillant boiler - and it was only when they finally cracked and sent the real Vaillant man that we got HW & CH simultaneously.

 

So a) get an engineer trained by (pref working for) the manufacturer - it may cost more per visit but you won't have to take so many days of work and b) ffs do not let anyone not Corgi approved touch any gas appliance let alone a combi boiler.

 

(our problem started with the diverter valve as gruntpa64 said and finished with replacing just about every servo, diverter, diaphragm, control pipes and whatnot before the Vaillant bloke spotted the new valve had been wrongly fitted...)

Ah yes te Valiant combi :x: :x: :x: Very specilised !!

worked on a few of them in the past over complicated but

very good. These combi boilers are very good until they go wrong

and then become a pain in the ass!! The reason that the diverter valve

fails is dueto ether the diaphram peferating or the selector shaft getting

jammed in the packing seal.

 

hope some of this helps

 

Allan

Ah yes te Valiant combi The reason that the diverter valve

fails is dueto ether the diaphram peferating or the selector shaft getting

jammed in the packing seal.

 

hope some of this helps

 

Allan

 

What? lol :D