1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Ideal classic ff250 overheating after switching off.

Discussion in 'Plumbing and Central Heating' started by Robert Perkins, 30 Dec 2020.

  1. Robert Perkins

    Robert Perkins

    Joined:
    30 Dec 2020
    Messages:
    15
    Thanks Received:
    0
    Country:
    United Kingdom
    Hi all

    I have an ideal classic ff250 which has been intermittently switching off by way of overheat stat popping out over the last 6 months or so. I've now come to realise it seems to only happens after the boiler has turned off (due to reaching correct temperature on room thermostat or water reaching correct temperature).

    Any ideas? I read in a different thread that the gas pressure may be too high. Does it sound reasonable. Or perhaps I need a new overheat stat?

    Many Thanks
     
  2. Sponsored Links
  3. muggles

    muggles

    Joined:
    28 Oct 2005
    Messages:
    12,751
    Thanks Received:
    2,828
    Location:
    Daventry
    Country:
    United Kingdom
    More likely to be a faulty pump
     
    • Like Like x 1
  4. Robert Perkins

    Robert Perkins

    Joined:
    30 Dec 2020
    Messages:
    15
    Thanks Received:
    0
    Country:
    United Kingdom
    Thanks for the response. Wouldn't a faulty pump mean it would overheat when the boiler was running rather than when it stopped? As far as I'm aware ideal classics don't have an overrun.
     
  5. ianmcd

    ianmcd

    Joined:
    15 Aug 2010
    Messages:
    20,501
    Thanks Received:
    7,978
    Location:
    Lanarkshire
    Country:
    United Kingdom
    Great boilers, most likely cause is the thermostat sensor, definately not the over heat thermostat, is it on a Y plan or an S plan ?
     
    • Like Like x 2
  6. Robert Perkins

    Robert Perkins

    Joined:
    30 Dec 2020
    Messages:
    15
    Thanks Received:
    0
    Country:
    United Kingdom
    Hi Ian. Thanks for the response. Its on a Y plan- does this make a difference to your advice?

    So would replacing the thermistor sensor lead be a sensible idea? Do you know the part number by any chance?

    Thanks
     
  7. ianmcd

    ianmcd

    Joined:
    15 Aug 2010
    Messages:
    20,501
    Thanks Received:
    7,978
    Location:
    Lanarkshire
    Country:
    United Kingdom
    137658 is the part number, be patient when removing the old one they can be a bit seized in, tell your engineer to do it with the heat exchanger hot and gently pull, or it will snap, you will need heat sink paste for re-fitting the new one
     
    • Thanks Thanks x 1
  8. Sponsored Links
Loading...

Share This Page