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I had a Lennox G71 installed a couple months ago. It worked fine but in the last week it has shut down twice with error code E273 - Any ideas?

Posted by Anonymous on

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: Lennox Gas Furnace that turns on and shuts off in minutes

After troubleshooting like mad, I found that the flame sensor (rod that sits within the flame) was fouled with carbon on the surface. I believe this shields the rod from proper heat detection and the sensor reports that there is no flame and to shut off the gas valve to avoid explosion. Once I pulled out the rod and cleaned it with a wire brush, I have no problem whatsoever--fixed.

Posted on Nov 20, 2008

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  • 85 Answers

SOURCE: Heater no longer works on auto fan, only manual fan

When you call for fan in auto ensure your getting 24 volts at pin on control board, if it is not energizing then there is a problem with the relay.. Before you change out the expensive control board, try the therm..

Posted on Dec 09, 2008

johnsonr1
  • 91 Answers

SOURCE: lennox lf24 garage heater, starts then shuts down.

Here is a link to the manual for your unit heater:

http://tech.lennoxintl.com/C03e7o14l/mk6x6w5J5/503526e.pdf

The 4 flashes is a high limit or roll out switch is open. There are 2 or 3 little brown or black button looking switches with a little button on the top and a wire attached to each side. Press the button on each, you may hear a slight "click". If you do, that is the one that was open. Hope this helps.

Posted on Nov 04, 2009

  • 215 Answers

SOURCE: The unit will turn on and run fine for a few

The ignitor will light, the blower will start up and run for a few minutes and then the system will shut down, and the blower will continue to run and cool down. The ignitor is not working properly, the ignitor has carbon build-up and need to be removed, cleaned all the black carbon from the ignitor with a little piece of sand paper and replaced, turn the heat back on and this should correct the problem.

Posted on Dec 14, 2009

SOURCE: I have Lennox pulse 21 control module light goes out

If this is a high eff model, check to make sure the intake vent is not plugged.

Posted on Jan 18, 2010

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