dcjcdc wrote:
have a lennox g43uf-48c-090-06 s-n 5905g15389 model of furnace
12 years old ...has dehumidifier on side if that helps....in the last 2 weeks...
the furnace has shut off in the middle of the night..
usually have set at 73 during day..night set at 68..woke up this morning 63
just turned heat up and went up to normal..same as last week..have honywell thermosat
- not sure if ffurnace related the shut down or thermostat..
should I start with changing thermostat
thanks
Thanks for your message. Yes, I would start with the thermostat. Please set the temperature to hold 68d at night or at your desired temperature and press permanent hold. If you are continuing to have issues please contact me at14165247228 .