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  1. McCombi

    Legal requirement for a gas safety check?

    Do they mean a check on the meter to make sure the readings are ok? Unless they have taken boiler cover? Then no need for them to check appliances just because you get energy from them. Maybe wires crossed somewhere, give them a call to confirm what it is they are asking. If you don’t want a...
  2. McCombi

    Adding a new rad, draining a sealed system

    You can use the filling loop on boiler to drain the system. You wouldn’t have to drain all of it’s just upstairs needing drained. Disconnect flexible hose from filling loop then open valve on right side of loop and water will drain out, open vent plugs on upstairs rads to assist draining until...
  3. McCombi

    Baxi Bermuda & back boiler - tiling behind

    Best to get a registered gas operative as fire needs to be located into part of back boiler properly and flue safety tests will need to be carried out also.
  4. McCombi

    What type of fire for plain chimney .. after back boiler removed

    Didn’t think you could leave a firefront that was part of a back boiler in situ if whole boiler and flue liner has been removed?
  5. McCombi

    Safety Check Weirdness

    What boiler is it? Some flues do have internal fall, so may be ok providing no additional extension pieces on it as they don’t have a fall iirc. In my opinion, as long as it’s a gas fitting/isolation valve then as long as not leaking then can’t see why it would be a issue. Not sure Reg the...
  6. McCombi

    ❄️!! Help Worcester ❄️24i RSF-L combi ❄️not working !! ❄️

    They were produced between 1997 and 2004 iirc. I’m a believer in fixing I possible but these are really getting on now. Had quite a lot of intermittent faults relating to pcbs in past
  7. McCombi

    ❄️!! Help Worcester ❄️24i RSF-L combi ❄️not working !! ❄️

    You thinking standard efficiency junior 24i? Think op has the earlier 24i rsf model
  8. McCombi

    Hi,Can you answer a few question for me please

    Found a 40kw Baxi duotec or platinum (can’t remember exactly) couple of years ago. 133 ignition errors. Only getting 6mb max working pressure at boiler as piped up in 15mm all the way from meter at other end of flat to loft 2 stories up. 20.5mb wp at meter. The best bit, was it was only...
  9. McCombi

    Hi,Can you answer a few question for me please

    Installed a 35kw combi with flue recovery to give equivalent of 40kw few weeks ago against my advice. Only getting 12 litres per min so a 27kw (equivalent of 30kw) would have been suffice. Customer was adamant he wanted it, and cost him about £300 more due to boiler price and gas pipe...
  10. McCombi

    Hi,Can you answer a few question for me please

    Best to speak to your installer reg gas pipe sizing. It all depends on how long the gas run is, how many bends and the size of gas appliances needing to be run off of it. When you have this information a calculation is done to work out required diameter of gas pipe. Size of combi depends on...
  11. McCombi

    Mt10 mechanical timer

    Casing has to be removed to change it, shouldn’t be removing case yourself as can affect combustion if not fitted correctly. Plus these cases can be a problem getting the silly design of bottom screws back in properly.
  12. McCombi

    Gas pipe size

    True. May have never been gas rated by any though. I seldomly do a gas rate on a se boiler if bp ok and no evident signs of any issues
  13. McCombi

    Gas pipe size

    Could be it's always been like that and it's a standard efficiency suprima boiler so nobody has ever checked inlet working pressure as the burner pressure has always been ok
  14. McCombi

    Worcester Highflow 400 Electronic RSF

    Could be a number of things tbh. Difficult without seeing it. Sounds like div valve maybe not sending all heat to plate heat ex and some passing to ch system but hard to check as if I recall, these things dump heat into ch circuit via pump overrun after a dhw demand anyway. As said, best to...
  15. McCombi

    Worcester Highflow 400 Electronic RSF

    Most likely problem is relating to a mixture of plate heat exchanger dirty, and bypass pipe behind diverter motor choked. Horrible job to fix in my opinion. Be better getting a fixed price repair off worcester if they still do them on these.
  16. McCombi

    Boiler in trouble - replace with system or heat only

    In future if you wanted to change to uv cylinder, you could setup as what's called s plan system. Be easier for you to search internet for a diagram of a s plan system than it would for me to explain fully but give you a rough idea. Heating flow pipe comes off boiler, external pump fitted...
  17. McCombi

    Gas smell from flue?

    Wouldn't say dodgy but need to be maintained like any other boiler. Common boilers.
  18. McCombi

    Boiler in trouble - replace with system or heat only

    Certainly doable. Was going to add it to my post but didn't want to add extra confusion
  19. McCombi

    Gas smell from flue?

    Get someone out to have a look. Get this a lot on these boilers. Could be a bad flue issue or an issue with a gas component.
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