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gmay10
join:2012-01-08
Mount Joy, PA

gmay10

Member

Re: Gas Furnace not always turning on

and there is a sticker with the legend on it about blinking lights

tp0d
yabbazooie
Premium Member
join:2001-02-13
Bulger, PA

tp0d

Premium Member

Have you changed the batteries in the thermostat? Thats the easiest fix. Need new batteries at the start of the heating season.

-j
gmay10
join:2012-01-08
Mount Joy, PA

gmay10

Member

Just put in a new thermostat last month with brand new batteries. This never happens in the summer time with the AC- only in the winter with the gas furnace. This has been going on for a year or longer.

SandShark5
Long may you run
Premium Member
join:2000-05-23
Santa Fe, TX

SandShark5 to gmay10

Premium Member

to gmay10
Well, I have never worked on a furnace with diagnostics that didn't have a way to view the LED through the blower panel. You never did say there was not a site glass, just that there is no way you can see the LED without taking off the panel. If there is a site glass, sometimes you have to literally put your eye right next to the site glass to see the LED because the site glass and the LED don't always line up with each other.

Do you feel comfortable holding in the door switch with the blower panel removed? If not, don't do it. If you do, just be careful because the blower might start running. Like I mentioned, you may have to hold the switch in for a while until the furnace locks out in order to see what the flash codes are showing.