burner not staying on

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mick777
mick777 Posts: 1
in Gas Heating
i have a mobile home furnace early model nordyne forced air.the problem is burners come on after glow plug glows 2 times the burner ignites for 5 seconds then drops out this is repeated until fan control gets up to temp.there is no flame sensor just glow plug for ignition.blower does come on at temp but why does burner keep going off?

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  • JUGHNE
    JUGHNE Posts: 11,644
    If you have no dedicated flame sensor then the glow plug (HSI) is also the flame sensor. Even though it glows red to ignite, it may not be able to do its job of sensing flame.

    It is about the least expensive part to change, they don't always last very long. They were very fragile on older furnaces. Probably not cleanable without breaking.

    Let us know.
    SuperTech
  • dssprint
    dssprint Posts: 1
    edited 7:38PM

    I have the same type mobile home furnace , runs for one of two days and shuts down until a power cycle. Not sure if I have a glow plug and flame sensor or combo. Need help taking it apart to get to replacing it. Can anyone give me advice on what it may be or disassembly advice. Thank you

  • SuperTech
    SuperTech Posts: 2,671

    Mobile home furnaces typically do not have a flame sensor. It would be best to determine what is the cause of the malfunction before we give you advice on taking things apart and swapping parts. Usually the ignition control will indicate a fault code, but if you cycle the power it will stop displaying it.

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