Boiler overheating?

[ace high]

Got A Halstead ace high 102

Problem:

when bath run lots of lovely hot water but 30 sec or after the hot tap is turned off and not during the boiler sounds like its boiling and the auto air vent lets out steam. ( But not while the boiler heating water).

Central heating works fine without any problems.


Any ideas thanks Peter

 

[meldrew's_mate]

Check the diverter valve pin is returning smartly when the hot water tap is turned off. Check the microswitch at the end of the diverter valve is not full of water, or it may be breaking down and keeping the flame on.

Does the problem also occur with the heating switched off?

 

[ace high]

I have let the boiler cool down then tried just hot water same problem.

 

[ace high]

Also just notice a small leak coming form the flow switch is this important?

 

[wanleg]

no probs corgi man.....pretty sure the DHW exchanger is not blocked but i'll look anyway...if it's not blocked any other ideas ? some other posts earlier were talking about microswitches with water in them and pins on diverter valves not closing quickly after the HW is closed ????

kevplumb - how many halstead aces (or combi's) have u seen with this type of issue on your travels around the pool ?

 

[kevplumb]

i would be looking at flow switches diverter valve

never had a lot to do with them

 

[corgiman]

but how would they cause the overheating??

am sure its a circulatory prob

 

[kevplumb]

not if the micro switcc sticks as in puma

 

[corgiman]

but what about the heating working ok?

 

[kevplumb]

good point

 

[wanleg]

One point I forgot to mention is the steam/air is only a problem when the CH is off...if I run a bath when the CH is on obviously the HW cuts in and takes over but once the HW has been utrned of I don't get the steam and air being expelled from the auto air vent.....does this prove or dis prove anything ?

I'll take the exchanger out at the weekend and DS-40 it I think.

 

[loafer]

bloody halsteads grrrrrrrrrrrrr. i got 1 keeps locking out both on dhw and ch..... (ace combi) changed thermistas ok ferra week now has gotteneven worse.

good luck

has any1 got owt 2 say thats good about halstead aces?????

 

[corgiman]

nope

 

[wanleg]

aces sounds like ar*es and Halstead is in Essex so not far to go to chin someone.......mind you it's a cheap boiler so the old rule of you get what you pay for probably applies. javascript:emoticon('')
Wink

 

[kevplumb]

wanleg gid us a shout (adress in profile) ill have a look

us monkeyangers must stick together