How do I replace the batteries in my Room Thermostat?
Remove the unit from the wall plate by inserting a flat-head screwdriver into the bottom slot and turning until catches release. Replace AAA 1.5V alkaline batteries correctly with positive terminals facing up (Page 20).
From the official Worcester Greenstar Comfort II RF manual, page 20
Have a follow-up question?
Answers from the official manual.
Common questions