I have a Honeywell TH800 Series thermostat controlling a heat-pump and furnace for forced air and aux heat.
Last week the touchscreen stopped responding. After playing around with it I took it off its mount and discovered a) it took batteries, and b) the batteries had been in too long and leaked. I cleaned off the worst of the crud and tried new batteries but still no touch screen.
I found other people suggesting the ribbon cable might need to be reset (eg https://homeheatproblems.com/honeywell-8000-pro-touch-screen-stuck-or-frozen/). When I cracked it open I found the battery crud had also reached and corroded a corner of the circuit-board. I tried cleaning that area as best as I could with rubbing alcohol (and had to resolder one of the battery terminals when it popped off for my trouble). The touchscreen came back for an hour and then died again. I've tried a bit more cleaning and resetting the cable but right now it's running the last program I set and not responding to input.
Obviously, with the board corroded I should replace it before I need a different program or it dies.
Knowing that SE sites don't permit product recommendations my question is, if I want to do a drop in replacement, is there anything I should be cautious of. Any features I might considering upgrading for in terms of quality life? Anything I should looking for in product information that might interfere with a drop in replacement. And anything else I should be cautious of doing this replacement.
Ideally I just want to unscrew the existing mount and terminal block, wire up the new one identically (with the same jumpers I see?) and go. I am not planning any changes to the HVAC system except replacement if components die. If anything location specific enters into this, I am in British Columbia, Canada. Additional image of the wiring in the furnace