Yes, I've tried taking the batteries out but I did not turn the power to the furnace off.
The model of the thermostat is TH 5110D1022
I found this online...will this reset the settings?
"One can always "Overide" the preset schedules by setting the temp at desired setting and pressing "Hold". If Hold is not pushed after setting temp it will only temporary be set and revert back to the factory or preset scedule at the preset programmed time.
OK to do the reset here is what your looking at but will take you back to a clean slate.
This will reset ALL settings even the heat pump or non heat pump, single stage 2 stage, etc....ALL of them and you will have to start from scratch to set up stat like when you first installed it
Ok to do a reset as follows:
Will this work for me? If I do this can I then just press the up and down to control the heat?
That's okay. I've called a service technician.