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Rudd heat system kicking off on high temperature limits.

I just installed 6 new burners of OEM part number, the old burners had rusted/holes in them. (This is an 8 year old Heat/Cooling pack unit, 5 ton cooling.) The unit will light off properly, the air circualtion fan will come on and 90% of the time cycle completes. The unit a RUDD UKKA-A060JK13E. Occasionally it will trip on the high limit switch located atop a metal strip that runs diagonally along top the 6 burners. The flame looks great, a solid blue color and there is nothing visible that I can see wrong.

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What if you replace the high limit switch, that should not be a difficult job.


Posted on Dec 05, 2008

  • Ginko
    Ginko Dec 05, 2008

    If the unit is kicking off far too often, test and eventually replace the high limit switch and the related thermic sensor (the metal strip)

    Check also the controls between the thermostat and the HVAC.

    If this system has a fan check that the fan is working, many modern furnaces use a fan that works at different speeds, in this case check that the fan controller is fine, if possible you can install an additional fan.


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