Honeywell 1-Heat/1-Cool - TH5110D1022 Large R Operating Instructions Manual page 10

Non-programmable thermostat
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Replace Batteries (Cont)
2. Press the battery holder latch to release the battery
holder.
3. Remove the battery holder from the thermostat.
BATTERY HOLDER
BATTERY HOLDER
LATCH
Replace Battery
Inside
Service Needed
Fan
System
Cool
Auto
M22111
10
69-1713

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