What is the proper disposal procedure if I'm replacing an old thermostat with mercury?
If the old thermostat contains mercury in a sealed tube, do not place it in the trash. Instead, contact your local waste management authority for instructions regarding proper recycling and disposal of the mercury-containing control.
From the official Honeywell Th8320U1008 Thermostat manual, page 1
Have a follow-up question?
Answers from the official manual.
Common questions