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Honeywell Controller keeps shutting off

brading
brading Member Posts: 8
in Oil Heating

I have a Trainco Eurostar 40/50 oil fire boiler with a Honeywell controller as per picture. When I just have it on Hot Water it runs fine. When I have it on Hot Water and Heating it runs for a maximum of 30 minutes then cuts off. the screen goes dead and I have to switch the power off and back on for the figures to come back up. Does anyone have any idea what is causing this. Also what model is the Honeywell controller.

Boiler Controller.JPG

Comments

  • brading
    brading Member Posts: 8

    I now know the controller is a Honeywell ST699

  • BDR529
    BDR529 Member Posts: 303

    Dirt in the contacts

  • brading
    brading Member Posts: 8

    Here is the back of the controller, wonder if the bit a the bottom left hand corner has a fault.

    Boiler Controller 2.jpg

  • Jamie Hall
    Jamie Hall Member Posts: 24,176

    What's overheating? And why?

    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 8,658

    yea…. Replace that

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

  • brading
    brading Member Posts: 8

    Thanks for the reply Ed. I take it that I will not be able to get the same model could recommend a suitable model please. Thank You Paul

  • HVACNUT
    HVACNUT Member Posts: 6,078
    https://forum.heatinghelp.com/discussion/comment/1812957#Comment_1812957

    Where are you located? I've never seen that control. What system is it connected to?

  • brading
    brading Member Posts: 8

    Kings Lynn. Think it is a very old version. As per my original post.

  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 8,658

    That appears to be a thermostat of sorts. originally available in UK

    Found a listing on amazon.co.uk but it is unavailvable.

    https://www.amazon.co.uk/Honeywell-ST699B1002-ST699/dp/B003E6KXP4

    I would need to know more about how it operates. Does your Trianco have a wiring diagram showing that Honeywell ST699?

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

  • brading
    brading Member Posts: 8

    Afraid not Ed the boiler was here when we bought the bungalow. Our Honeywell ST688 is a programmer that lets me set what time the boiler come on and goes off for heating the water for the sinks and bath, and I can do the same for when the boiler comes on for the radiators. We have a separate thermostat for controlling the temperature. I take it you are in the USA

    EdTheHeaterMan
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 8,658

    Yes, USA. And I am not familiar with that device. Does your Trianco have a sticker or plate with a model number and serial number? Sometimes it will have the specifications or rating on that sticker or plate.

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

  • HVACNUT
    HVACNUT Member Posts: 6,078

    So it's not a thermostat, but a timer with a bypass. It seems it's some code in your area.

    The issue is, here in the states, most residential controls are 24 vac powered, where you guys use 230 vac. And what with the 50 hertz stuff? 60 is where its at.

    Are there not neighbors with a similar system, or any local heating companies you could ask? Because we could give you some information that directly violates the codes in your area. And that could have a direct effect on our awesome alliance.

    SuperTech
  • brading
    brading Member Posts: 8

    Hi Ed and HVACNUT. I have just spoken to a local heating guy and he has confirmed that the controller is faulty and to change it a modern Honeywell ST9400. So I am going to get one and get an electrician to change the wiring over. Thank very much both of you for your help, really appreciate it. Have a nice day. Cheers Paul

    HVACNUT
  • brading
    brading Member Posts: 8

    Just an update. Changed the Honeywell ST699 to a Honeywell ST9600 and the system is working fine now.

    SuperTechHVACNUT

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