Welcome! Here are the website rules, as well as some tips for using this forum.
Lyric thermostat and ODR issue
I recently replaced my old White Rodgers 1F80-361 thermostat with a Honeywell Lyric T6 Pro. At the same time I abandoned the old cloth covered 18/3 thermostat wire with new 18/8. I installed a Honeywell L7224U aquastat with the outdoor reset module a couple years ago and it's been working great. I ran the eight conducted wire so I would have enough conductors to power the thermostat using the RC and common terminals and use the sensor terminals to wire the outdoor sensor to the T6.
The issue that I have encountered is that the Lyric thermostat indicates an outdoor sensor fault, but the aquastat is still reading outdoor temperature perfectly and the reset module is operating normally. I have checked resistance with my meter and haven't found anything unusual. I know that the Lyric thermostat doesn't need the sensor to show outdoor temperature, but this still doesn't explain why these Honeywell components aren't working with each other
Has anyone else encountered this or have an explanation? Nothing in the manuals for any of the components mention anything of this nature.