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TH5110D

3

69-1713—01

REPLACE BATTERIES

1.

When the Replace Battery indicator is flashing, 
replace batteries promptly with two fresh 
AAA alkaline batteries.

NOTE:

The thermostat does not lose any settings when 
the batteries are replaced; all settings are 
permanently stored in memory.

2.

Press the battery holder latch to release the battery 
holder.

3.

Remove the battery holder from the thermostat.

4.

Remove the old batteries and insert two fresh AAA 
alkaline batteries as marked on the battery holder.

5.

Insert battery holder as shown.

Battery Tips

REVIEW BATTERY TIPS

1.

Replace the batteries as soon as Replace Battery

 

flashes in the display. The Replace Battery indicator 
flashes in the display two months before the 
batteries run down completely.

2.

Always use fresh AAA alkaline batteries. 
Non-alkaline batteries do not last as long and can 
leak, causing damage to the thermostat.

3.

Although the thermostat has a Replace Battery 

 

indicator, replace the batteries once per year to 
prevent the thermostat and heating/cooling system 
from shutting down due to a lack of battery power.

NOTE:

Replacing the batteries once a year also helps 
prevent battery leakage that can damage the 
thermostat.

4.

As a precaution, replace the batteries when leaving 
your home for more than a month to prevent your 
heating/cooling system from shutting down if the 
batteries run down completely.

BUILT-IN COMPRESSOR 
PROTECTION

The TH5110D Thermostat has built-in compressor 
protection (minimum-off timer) that prevents the 
compressor from restarting too early after a shutdown.

The minimum-off timer is activated after the compressor 
turns off. 

If there is a call during the minimum-off timer, the 
thermostat flashes “Cool On” or “Heat On”

 a

 in the display. 

 When the minimum-off timer expires, “Cool On” or 
“Heat On”

a

 appears solidly in the display and the 

compressor and the fan turn on.

_________

 a  

Heat Pumps only.

Replace Batt

Replace Batt

Service Needed

Replace Battery

REPLACE BATTERY INDICATOR

M22110A

Replace Battery

Service Needed

Service Needed

BATTERY HOLDER

LATCH

BATTERY HOLDER

M22111A

M22017

BATTERY

HOLDER

PUSH

BATTERIES

OUT

THROUGH

THIS HOLE

BATTERY

DIRECTION

Replace Battery

Service Needed

Service Needed

BATTERY HOLDER

LATCH

BATTERY HOLDER

M22111A

Summary of Contents for TH5110D

Page 1: ...ge Battery Holder Built in Compressor Protection Minimum off timer protects compressor from restarting too early after a shutdown GET TO KNOW YOUR THERMOSTAT Thermostat Display Inside M37933A Cool Coo...

Page 2: ...omes The fan runs only when the heating or cooling system is on On The fan runs continuously Use this setting for improved air circulation or for more efficient air cleaning Change Temperature Setting...

Page 3: ...cooling system from shutting down due to a lack of battery power NOTE Replacing the batteries once a year also helps prevent battery leakage that can damage the thermostat 4 As a precaution replace th...

Page 4: ...the System setting to Auto NOTE The Auto setting appears only if the thermostat is set up for Auto Changeover by your heating and air conditioning dealer 2 Press the Up or Down button to raise or low...

Page 5: ...ing the System button Check the cool temperature setting to be sure it is set below room temperature and Cool On shows solidly in the display Check the circuit breaker to be sure it is not tripped Che...

Page 6: ...with your product please visit www honeywellhome com or call Customer Care toll free at 1 800 468 1502 Before calling please have the thermostat model number and date code available M22047A xxxxxxxx...

Page 7: ...sed by damage which occurred while the product was in the possession of a consumer Resideo s sole responsibility shall be to repair or replace the product within the terms stated above RESIDEO SHALL N...

Page 8: ...is used under license from Honeywell International Inc This product is manufactured by Resideo Technologies Inc and its affiliates www resideo com Resideo Technologies Inc 1985 Douglas Drive North Go...

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