LUX digital stat Trane XE80 intermittant problem

rossl56

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

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

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

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

problem was resolved since the Honeywell was installed

kennzz05

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


happy holidays

rossl56

I had no lux with mine