I noticed my honeywell thermostat screen was blank the other day and so I powered down the heating unit and powered everything back up. It seemed to do the trick for a while, by my display screen is blank again. Not sure if I just need to replace the thermostat or if this is a symptom of something wrong on my HVAC. When I detach and reattach the screen on the thermostat comes on for a few seconds, and then goes blank again.
It actually sounds like the batteries are going dead if the 24v from the furnace are not providing the power to the thermostat.
What batteries? There are no batteries with this thermostat. Joel
there are batteries inside these stats, a CR2032 which is not rechargeable, when the battery dies, so does the control unit
There is actually a 3232 iirc inside the timer
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