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Central heater on syart up runs for a few seconds then shuts down

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  • scott681 Apr 17, 2009

    all the fans are working have checked them it is a vulcan power 100 it is like the flame sensor is not working but have changed that and it did not help whan i turn it on the fan starts it lights it stops

  • scott681 Apr 17, 2009

    vulcan power 100 central heater when i turn it on the fan starts it lights it turns off straight away it only runs for about 10 seconds heater man was out changed fan said it will work but no it does not

  • scott681 Apr 18, 2009

    that not work either

  • scott681 Apr 18, 2009

    this is not a/c at all just heater unit

  • scott681 Apr 18, 2009

    when heater ignites the starter keeps clicking like it thinks it is not lit

  • scott681 Apr 18, 2009

    green light fault light says it is an ignition problem

  • scott681 Apr 18, 2009

    yes it does sounds like you are talking about a wall heater not central

  • scott681 Apr 18, 2009

    yes it does when i turn on thernosate at wall the central heater units starts the burners light but the starter keeps trying to light then it shuts down it is like it does not realise it is lit i changed the flame sensor but it made no diff

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6 Answers

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  • Master
  • 3,037 Answers

First Turn up the thermostat all of the way and see if it still turns off immediately. If it doesn't then you probably didn't have it turned up high enough. If it still turns off, then press the circle button to extinguish the pilot. Wait until a click is heard (approz 2 mins) before relighting pilot, taking care not to depress the circle button. Then turn the thermostat knob up.

Let me know the outcome of the above and we can go from there to figure this out completely.


Benjamin

Posted on Apr 18, 2009

  • Benjamin Patri
    Benjamin Patri Apr 18, 2009

    Does yours not have a thermostat for some reason? Did you try my suggestions. I took the circle button part directly from Vulcan. I am not as familiar with this company as others so that probably isn't helping but I would like you to turn the thermostat all the way up to see if it will turn off still after 10 seconds.

    let me know what happens

    Benjamin


  • Benjamin Patri
    Benjamin Patri Apr 18, 2009

    Can you disconnect the starter after the unit lights? If so, let it light, disconnect the starter and see if it still shuts off. Also do the same thing with the flame sensor (I'm not sure if it will let you, but give it a try). Either the sensor or the board is causing the problem. I'm thinking the board might be bad but please get back to me after trying this.

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  • Master
  • 19,396 Answers

Check the starter capacitor and run capacitor. The run capacitor must be replaced.

Posted on Apr 18, 2009

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  • Master
  • 374 Answers

Hi there,
threre a factor to consider ,if this an electictric heater check main circuit breaker push it on maybe trip off,reset over load protection relay on panel control,just push lever to reset,check thermostat setting if reset tempearature setting this are control w/c sometime cut off your power.hope this could help you.

Posted on Apr 18, 2009

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  • Master
  • 659 Answers

It is the roll out switch on the burner box. You will have two wires going to a small disk the size of a dime or penny. Between those two wires is a small button that you will depress firmly. This roll out switch senses excess heat when the flame is lit. If you reset and the unit will not start up, take a jumper wire and remove the two wires from the switch and put the jumper in. Try it again and if the unit starts and runs, then the switch is bad and you will need to replace it. You can keep the jumper in only as a temporary measure as long as you can see that the flame isn't being blown back into the fire box. If you see signs that the flame is being pushed back into the box, then this means you have a hole in the heat exchanger and you must shut the system down. Hope this solves your problem.

Posted on Apr 17, 2009

  • Donni Steen Apr 18, 2009

    If it is not the limit switch, then then there only two other options. The thermostat could also be shorting. Bypass it and see if it will run. But I am positive it is a limit switch on the unit. This is the only thing that will cut a unit off when the flame is lit besides the sensor, which you said you replaced. Locate all the limits and try resetting them and then one by one, bypass them to locate it.

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  • Heating & Co... Master
  • 76,691 Answers

Check the air flow temp sensor, it may have a faiulty signal that shuts the heater down.

Posted on Apr 17, 2009

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  • Master
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Hi scott681,
Are you saying it's not blowing any air out of the vents or is it just the outside unit(Condenser) that quits? If it's the fan that not working, the you probably have a defective blower motor that's heating up and going out on overload. When it cools down(sits for awhile) it will restart and then go out again. Not real uncommon.


Any further help, let me know.
Thanks for using Fixya.
Do rate this solution as "Fixya" if 100% satisfied.

Posted on Apr 17, 2009

  • taran_2005
    taran_2005 Apr 17, 2009

    Hi Scott681,
     




       Great!!!


    Now, you do agree that there might be millions of reasons from a small switch to a compressor that might be at fault. It's not possible for us to jump the conclusion and to discuss each and every aspect here in detail.


     I am giving you a link :-


    http://www.inspect-ny.com/aircond/aircon...



    It will help you to check how A/c works. What should you check first and what can be done..


    Believe me , this is as explained as i have ever seen :)


    Hope you could download and look at each and every aspect at  your ease.


    Thanks for using Fixya.


    Do rate the solution as "'Fixya" if 100% satisfied.

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