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

Potterton Profile 40e - Firing up problem

Discussion in 'Plumbing and Central Heating' started by Stjamespark, 17 Jan 2021.

  1. Stjamespark

    Stjamespark

    Joined:
    17 Jan 2021
    Messages:
    1
    Thanks Received:
    0
    Country:
    United Kingdom
    Hi all,
    After some help here. I have done timings of events when boiler fires up from cold (start of program):

    09:17 Boiler fired up all ok. Set to Max
    09:30 Boiler switches off. Outer casing hot (probably normal)
    09:31 Boiler tries to fire up. Sounds like relays/valves are working. Fan starts for all of about 1 sec. this continues for about 10 attempts till finally firing up.
    So at 09:33 the boiler fires up properly.
    09:37 switches off
    09:39 same as 09:31

    Note when boiler starts first time from cold it heats to thermostat setting on boiler. I replaced the PCB a year ago. New pump installed a year ago (in airing cupboard).
    The issue has started in the last couple of weeks. Once fired up it does the job of CH & HW.
    Boiler is approximately 20 years old. No unusual noises thankfully.

    Thanks
     
  2. Sponsored Links
  3. MeldrewsMate

    MeldrewsMate

    Joined:
    27 Jan 2010
    Messages:
    1,064
    Thanks Received:
    265
    Location:
    Buckinghamshire, Darn Sarf
    Country:
    United Kingdom
    I suspect that, despite changing it a year ago, that control PCB is faulty.
    You can usually hear a relay clicking in and out in time with the fan starting and stopping.
    It'll get steadily worse.
     
    • Thanks Thanks x 1
  4. Mottie

    Mottie

    Joined:
    27 Feb 2017
    Messages:
    18,882
    Thanks Received:
    1,887
    Location:
    Essexshire
    Country:
    United Kingdom
    I changed the PCB three times in my profile 60e in my 25 years ownership. Same symptoms as you had. last one I bought from a plumbing merchants on a Christmas Eve and I seem to remember paying £220 for it as it was a genuine one. When I replaced the boiler a few years later, I sold the PCB on ebay for more that you could buy a pattern part one for. I think I got about £60 for it.
     
  5. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
Loading...

Share This Page