Range Tribune Combi Boiler Not Heating Water / Rads - HELP!

Sharons1987

hi all, Hoping you can help as i've exhausted all tests I can do! I have a Range Tribune Combi Boiler in property ive just bought (sticker suggested fitted May 2012). I had it serviced about 4 weeks ago as soon as i moved it, eng suggested all was fine other than slight drip from filling loop that might require a change (this has long since stopped) . However, at best i get lukewarm rads, and in the last week or so no heat at atll - boiler fires up as normal, valves i can see / hear opening (danfoss HP2A i took top off to check visually - all good), everything appears to fire as normal but no heat. Have bled all rads, checked pressure if as it should be - all good! Also having issue with getting no hot water off the back of timer (both water and rads controlled by danfoss thermostat on wall on the cupboard where boiler is) - i can only get hot water by switching on the immersion at the wall to heat the tank! 

Any one have any other thoughts? Feel like im going mad especially as the service signed it all off as ok!

Photos added for ease! thanks in advance!

Sharons1987

No sure if photos visible i can seem to get them to add??

[Deleted User]

Have a read of this link:

https://heatingforce.co.uk/blog/faulty-diverter-valve-boiler/

Tallerdave

Is there any heat in any of the pipes coming from boiler? Is the pump running?

Sharons1987

Hey both! @[Deleted User] - yes there are two values, both are working perfectly far as i can tell (kick in when they should can hear the valve open, can see level move, boiler all fires up as its supposed to)

@Tallerdave Yes the pump is running (and hot to touch) and the pipes themselves are warm (hot if left for a longer time) all the way up into the box (where it think the plate is)

So confused by this one as far as the boiler, it seems to be doing all it should - might the wall thermostat be an issue? or the plate? (images finally attached) 

Thank you in advance - as I say ive had it serviced and they said all fine, happy to pay for someone else to come out but no clue what for / who!

Sharons1987

Sharons1987 said:

Hey both! @[Deleted User] - yes there are two values, both are working perfectly far as i can tell (kick in when they should can hear the valve open, can see level move, boiler all fires up as its supposed to)

Sorry two valves (danfoss HPA2) have also checked with top off and manually moved) levels move as they should too! so a bit stumped! Pictures attached - if that helps? Maybe im missing something really obvious!

tim_p

I’ve ‘fixed’ sticking valves by giving them a good clonk with a hefty screwdriver handle.

Sharons1987

@tim_p the valves seem to be totally fine - no sticking at all!

[Deleted User]

If the boiler is on and you manually open the valve then hot water should flow through the open valve. Another possibility is an airlock in one of the vertical pipes. These can be difficult to shift.

Tallerdave

I can't see the photos - they won't open.  What is "the plate" ?

I'm confused - Range Tribune products are hot water cylinders, which surely means you don't have a combi boiler but a system boiler with a hot water tank.  What make is the boiler?

tim_p

Sharons1987 said:

@tim_p the valves seem to be totally fine - no sticking at all!

Are you sure?  If there’s hot water on one side but not another then they will be physically sticking or the motor has failed. 

Edit: or they are not being switched by the controller - possible loose connection