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My thermostat is flashing L6 instead of temperature display. It is a basic LED nonprogrammable model about 4 years old.

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  • margotlea Oct 30, 2008

    My display also began blinking this morning as I tried to switch it from the off mode to Heat. I can still adjust the temperature but the display continues to blink L6 after a few seconds.

  • Anonymous Jan 16, 2009

    same issue...the furnace manual is totally silent re any error message for this...

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Check the battery in the thermostat (on the wall)

Posted on Jan 19, 2009

Checkout the manufacture website! thank-you-very-much!

Posted on Aug 27, 2008

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