Our Honeywell TH8000 series thermostat started running at 60 degrees and the "change filter" display was flashing. I checked the furnace and the light was flashing for "intake obstructed". I change the filter and when the furnace ran again the indicator lights returned to normal. However, the thermostat is still not happy. It still says "change filter". There's a reset button visible, but it doesn't respond. The only controls that work are the temp up and down controls , and the More button. Pressing the More button takes me to a filter screen with Reset, Edit, Done, and Cancel buttons. There is a number 0 displayed. The only button that does anything on this screen is the Cancel button. The temp up and down controls on the main screen allow us to take the temp up from 60, but it's a temporary override with a time limit. The time limit also has up and down controls that work, but we can only go for a few hours. For all the buttons I need to push, I've tried long presses, I've tried fingernail presses, nothing changes. We've been in this house less than two years and I've replaced the filter before, but never had to press the reset filter button. I'm concerned that the thermostat was set with a zero day countdown on the filter reset and the intake obstruction caused the reset filter indicator to go on, but there's a programming glitch that won't let you reset with a zero day timer. I can see where an intake obstruction would cause the thermostat to go into a limited functionality mode and wouldn't let me do anything else. I've tried taking the thermostat off the wall and removing the batteries, that didn't work. Help!
- posted
4 years ago