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  1. R

    Worcester Heatslave humming

    Heatslave 20/25 subtle humming from boiler new motor fitted fully serviced recently, it's the sort of sound you would get from a HV transformer that sort of hum deep and annoying, nothing to do with circulation pump it's still there with the circulation pump off. I guess it only leaves the oil...
  2. R

    Kick board fan assisted heat exchanger ?

    Removing 4ft radiator in kitchen and looking at installing one of those under unit heat exchangers due to having no wall space in new kichen, what size and model to go for.
  3. R

    Best 90mm shower waste

    Looking for a top access 90mm shower waste, what's a good quality one, also want it sealed and usable as quickly as possible, do you install with silicone added to the seal top and bottom and if so which is the quickest curing silicone.
  4. R

    Oil pump pressure on B11Heatslave 20/25

    As a ballpark figure what pressure should I expect on a b11 burner Worcester Heatslave 20/25.
  5. R

    Worcester Bosch Heatslave 20/25 oil hose size

    Worcester Bosch Heatslave 20/25 oil hose need to pick one up from my local plumb merchants and hes asking what size connectors male female etc does anyone know the spec i require thanks
    • richard3009
    • Thread
    • bosch size worcester worcester bosch
    • Replies: 2
    • Forum: Boilers
  6. R

    Noisy fan part 2

    Adjusted the fan out slightly on the grub screw, worse if anything, are the danfoss oil pumps prone to wearing on the other end
  7. R

    Noisy Heatslave 20/25

    Just changed the blower motor on my heatslave 20/25 and to be honest its no better, I can hear the boiler throughout my pipwork and rads, pretty sure its not the water pump as I have listened to that run without the fan mortor running, what can make a boiler so noisy?
  8. R

    Worcester Heatslave 20/25 pressure valve sticks

    Worcester Heatslave 20/25 pressure valve sticks open when manually releasing pressure, takes a lot of faffing around to get it to close, is it a replacement job
  9. R

    Importance of pressure on Combi's ?

    Noticed my combi mains water pressure had dropped to 0.3 of a bar tonight so re-pressurised to just over a bar my fault haven't topped it up for ages and noticed the bath taps running luke warm. My question is why do combi's require such pressure and how is it maintained when there is a...
  10. R

    Worcester Heatslave oil 20/25 electrical issue

    My Oil fired Worcester Heatslave makes a strange loud click every so often, it sounds like an electrical contact as it happens all the lights in my house dip for a split second, the boiler does nothing its when the boiler is stood idle no call for heat as the room stat is up to temp. All I can...
  11. R

    Rads too hot to touch

    Worcester Heatslave 20/25 oil fired boiler 4 years old, diverter valve renewed 3 months ago. I don't seem to have any control over my radiator temps they get seriously hot too hot to touch, not sure if boiler c/h stat is working how can I check, I have turned it fully down and it has no impact...
  12. R

    Price for a Honeywell VC4613-30 diverter head

    Is the vc4613-30 the only cartridge that will fit is this the same thing and is it cheaper any where else ??? 2 &3-way zone valves & actuators, 230 VAC, 1/2->1", type VC4613 - VC4613AF1000 , VC4613AF1000XREF , VC4613AJ1000 , VC4613AJ1000XREF , VC4613AP1000 , VC4613AP1000XREF , VC4613MH6000 ...
  13. R

    Diverter valve Heatslave 20/25

    The diverter valve on my Worcester 20/25 stuck down a few months ago resulting in my radiators getting red hot even when the stat was not calling for heat. I managed to free the valve however 2 months later I had the same issue, inspection of the valve showed it to be free moving and returning...
  14. R

    Pressure on Worcester Heatslave 20/25

    The water pressure on my Worcester Heatslave 20/25 is at just over 2 bar is this above normal operating pressure, secondly I have a couple of upstairs rads that will not seem to bleed they are only warm at the bottom quarter, more problems to follow but that's enough for now. Thanks in advance
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