Discuss Myson Apollo in the Plumbing Jobs | The Job-board area at PlumbersForums.net

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lolipop

Gas Engineer
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Hi guys I ve been to one of these boilers today it's on a y plan the boiler fires but pump does not run ,changed 3 way valve but just the same ,the pump is wired from boiler but getting no live !! I was thinking boiler pcb ????has anyone got experience on this boiler ?? Anyway got hte and hw on by wiring pump straight onto 3 point plug any ideas guys
 
Here is a wiring diagram, looks like the pump is wired in with the pump overrun stat I'd start there
 

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Cheers zbd this drawing very helpful that pump overrun stat needs checking where abouts on boiler is it as this appliance is in the most awkward location
 
This one is not getting repaired it's fitted in an alcove 6 " off the floor ,and 6" gap between front of boiler and cylinder then a built in sliding door and frame to hide it I ve got it running for Christmas for them then a new boiler required
 
I think the pcb goes for around ÂŁ180/ÂŁ190 but other then that and a fan I've been told your be lucky to get anything!
 
The stats on these go too, thats worth checking.

I've no idea if you can still get the stats, been a few years since i changed one.
 
The stat is still available. Part no: 402S088. roughly ÂŁ18.00 inc vat.
Situated at the bottom right hand side at the rear of the combustion chamber on a bracket.
By the sound of it, it would be a t**t to do. You could transfer the pump supply to the boiler SL and lower the boiler temperature as a temporary measure.
 
One of the lightest boilers on the market at the time, loved them!! It will be the overrun, nowt else would cut the pump out except a knackered pump or it's supply wire...! :)
 
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