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Limit open,or external load on w, Nordyne Furnace

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

billyvangogh
  • 108 Answers

SOURCE: miller furnace model M3RL080 BW, code flashes open

Check your furnace filter any Limit fault code usually relates to airflow...Not enough...causes the furnace to run too hot and shut off....the furnace can be too big for your house if its new...the ductwork can be too small , also make sure your return air vents are clean and unobstructed . Your furnace can be running too long a cycle ....also if you have central air conditioning the coil for the AC in the Furnace can be dirty...restricting airflow...if all this seems ok you can usually increase the fan speed or try tunning the fan in the "On" position on your thermostat this will promote better circulation

Posted on Oct 25, 2009

Therinnaiguy
  • 1420 Answers

SOURCE: code: open upper limit on a 1 yr old Goodman furnace

The sensor over the flame has tripped. It will need to be replaced or check for a disconnected wire.

Posted on Oct 11, 2009

Testimonial: "thank you, do you know of a good plce to get a sensor. I saw the sensor looked okay no wire disconnectd so it must be bad"

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Check your furnace filter any Limit fault code usually relates to airflow...Not enough...causes the furnace to run too hot and shut off....the furnace can be too big for your house if its new...the ductwork can be too small , also make sure your return air vents are clean and unobstructed . Your furnace can be running too long a cycle ....also if you have central air conditioning the coil for the AC in the Furnace can be dirty...restricting airflow...if all this seems ok you can usually increase the fan speed or try tunning the fan in the "On" position on your thermostat this will promote better circulation

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