worcester 9.24 electronic no hot water problem

[moogwai]

hey boys after some help on an old boiler which i replaced the divertor on 10 months ago.
dude phoned me earlier to say he has no hot water but heating is fine. I'm thinking it could be the micro switch as i doubt the divertor would go in 10 months and i know the system is clean as i powerflushed it as well.
do you guys have any experience with this dinosaur of a boiler?? i dont think it has a flow switch....which i wouldve gone for. I dont think the dude can afford to replace it either.
cheers.

p.s...how can i test the microswitch with a multimeter to prove it?? pm me if you can please.

 

[moogwai]

if its the valve,seems unlikely after 10 months,but everything can go wrong

i know.....i thought it was a bit odd.

 

[Billy Bob Bob]

double check everything i posted in post #4

 

[moogwai]

its gotta be the diapragm as the plunger is only moving a fraction and not contacting the microswitch when calling for hot water......i did put a penny on top of the plunger and it worked fine...but don't really wanna leave it like that!!

 

[Billy Bob Bob]

its gotta be the diapragm as the plunger is only moving a fraction and not contacting the microswitch when calling for hot water......i did put a penny on top of the plunger and it worked fine...but don't really wanna leave it like that!!

probably,but a passing mixer tap or shower would have the same effect,its a rare situation to have this fault,try a new diaprahm if its easy to replace,to test for mixers passing isolate the cold at the boiler if you can,and disconnect the hot outlet again if possible due to the boilers age if you have water continuously coming through the hot its a mixer tap/shower issue

 

[mickie]

not tried turning down the flow rate on the outlet side of the diaphram?

 

[moogwai]

probably,but a passing mixer tap or shower would have the same effect,its a rare situation to have this fault,try a new diaprahm if its easy to replace,to test for mixers passing isolate the cold at the boiler if you can,and disconnect the hot outlet again if possible due to the boilers age if you have water continuously coming through the hot its a mixer tap/shower issue

gotcha...i see where you are coming from...thanks gas man.

 

[moogwai]

not tried turning down the flow rate on the outlet side of the diaphram?

no....to be honest didn't think of doing that...i suppose it would make the pressure greater on the diaphragm to lift it up.....another thing to look for.

 

[moogwai]

phoned place today and they are sending me a repair kit foc....fair play.