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rossl56 12-10-2008 06:19 AM

LUX digital stat Trane XE80 intermittant problem
I just moved into this house and replaced the original Honeywell analog stat with the LUX programable stat. I used the 2 wire config, since there are only 2 wires from the furnace to the stat. It has been working fine for the last month except on 2 occassions that the furnace did not turn on. This does not happen all the time. When it does happen and I "manually" increase the thermostat the furnace turns on.

Example 1) This morning I noticed the temp was 65 the stat was set to 68, but the heat never came on. When I turned the stat to 69 the heat started. I have it programmed to go to 68 about an hour before I get up.

Example 2) The last time this happened I turned the stat down while the furnace was on. When the temp went below the stat setting the furnace did not turn on. Again I had to manually adjust the stat and everything worked fine, until today.

Should I suspect the stat or the furnace?

sammy37 12-10-2008 10:20 AM

Probably just a bad stat, Lux is not the best brand out there. Go over to lowes or H.D. and grab a good Honeywell stat. Make sure you shut the power off first so you dont fry your transformer or blow a fuse.l

rossl56 12-13-2008 12:26 PM

Got a Honeywell will return the LUX. Anyone else have an opinion?

My concern is that the furnace control board is getting "confused" when I interupt the heat on cycle by turning down the stat.

beenthere 12-13-2008 02:58 PM

The furnace doesn't know the difference between you adjusting the stat, and the stat operating normally.

Lux stats, aren't made to be high quality.

rossl56 12-25-2008 01:09 PM

problem was resolved since the Honeywell was installed

kennzz05 12-25-2008 06:32 PM

lux used to be a good dishsoap never was a good tstat

lux socalled because you had to rely on your luck that your system worked after it was installed :laughing:

happy holidays

rossl56 12-26-2008 05:53 AM

I had no lux with mine

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