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Intertherm Furnace Will not stay on

I have had to hit the reset button for it to heat. Now, I have a blinking light that indicates "Limit Circuit Open or External Load on W." What does this mean?

I have had several problems with this furnace. Every year it seems we have to replace a part or two.

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  • Keith Miller
    Keith Miller May 11, 2010

    limit switch can be high temp in fire box due to low air flow dirty air filter will the blower fan run

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  • 30 Answers

Your furnace is likely getting too hot check your filter. make sure the fan is running. if you have weak air flow you may have a blocked heat transfer coil. you should have your heating and cooling system serviced yearly by a qualified company to inspect and test equipment.

Posted on Jan 05, 2009

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diths_kri
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SOURCE: Intertherm Furnace Will not stay on

dirty air filter low air flow causing high temp in fire box to trip limit switch or fan motor

Posted on Jan 07, 2009

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  • 2 Answers

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Posted on Jan 02, 2017

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