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Honeywell TH5110D Support Question

Honeywell TH5110D Support Question

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Question posted by kdnpe on April 20th, 2011

Honeywell Th5110d Thermostats Don't Work

I replace two mercury switch thermostats, upstairs and downstairs, with new Honeywell TH5110D thermostats.  They don't work.  I reinstalled the old thermostat and the units work.  Any suggestions?

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Related Honeywell TH5110D Manual Pages

Owner's Manual - Page 1

... these Instructions Patents Pending ® U.S. Operating Instructions TH5110D Non-programmable Thermostat OPERATING INSTRUCTIONS The TH5110D Thermostat provides electronic control of 24 Vac singlestage heating and cooling systems or 750 mV heating systems. For assistance with your Honeywell product please visit www.honeywell.com/yourhome or call Honeywell Customer Care toll free at 1-800-468...
Owner's Manual - Page 2

Contents Features 3 Get to Know Your Thermostat 4 Thermostat 4 Display 5 Operate Your Thermostat 6 Set System Setting 6 Set Fan Setting 7 Change Temperature Setting 8 Replace Batteries 9 Review Battery Tips 13 Built-in Compressor Protection 14 Auto Changeover 15 Replacement Part 19 Troubleshooting Tips 20 Customer Assistance 23 Limited Five-Year Warranty 24 2 69-1713
Owner's Manual - Page 4

Get to Know Your Thermostat Thermostat DIGITAL DISPLAY BATTERY HOLDER LATCH PRESS TO RELEASE BATTERY HOLDER Inside SetCtinogol Fan Auto SysteCmool On Cool PRESS BATTERY HOLDER TWO AAA ALKALINE BATTERIES TEMPERATURE ...
Owner's Manual - Page 5

Get to Know Your Thermostat (Cont) Display INSIDE TEMPERATURE INDICATES BATTERIES ARE LOW AND MUST BE REPLACED Inside Replace Battery HeatCool Setting TEMPERATURE SETTING Fan On Auto Heat On Cool On System Heat Cool AutoOff INDICATES THERMOSTAT IS "CALLING" FOR HEAT OR COOL CURRENT FAN SETTING CURRENT SYSTEM SETTING M22083 69-1713 5
Owner's Manual - Page 6

See Auto Changeover section. CAUTION Equipment Damage Hazard. Replace Batt Service Needed Fan System Auto Cool PRESS THE SYSTEM BUTTON TO SELECT HEAT, OFF, COOL OR AUTO. Auto-Thermostat automatically changes between heating and cooling operation, depending on indoor temperature. M22107 6 69-1713 Off-Both the heating and cooling systems are off. Cool...
Owner's Manual - Page 7

Operate Your Thermostat (Cont) Set Fan Setting Press the Fan button to select Auto or On: Auto-Normal setting for more efficient air cleaning. Use this setting for improved air circulation or for most homes. M22108 69-1713 7 Inside Replace Batt Cool Setting Service Needed Cool On Fan System Auto Cool PRESS THE...
Owner's Manual - Page 8

Inside Replace Batt Service Needed Cool On Fan System Auto Cool TEMPERATURE SETTING PRESS THIS BUTTON TO RAISE THE TEMPERATURE SETTING PRESS THIS ... changes the temperature setting. 8 69-1713 The second press of the Up or Down button turns on the backlight. Operate Your Thermostat (Cont) Change Temperature Setting Press the Up or Down button to select the desired temperature setting.
Owner's Manual - Page 9

... Battery indicator is flashing, replace batteries promptly with two fresh AAA alkaline batteries. all settings are replaced; REPLACE BATTERY INDICATOR Inside Replace Battery Cool Setting Service Needed Fan System Auto Cool M22110 The thermostat does not lose any settings when the batteries are permanently stored in memory. 69-1713 9 Replace Batteries AA alkaline batteries. 1.
Owner's Manual - Page 10

Replace Batteries (Cont) 2. BATTERY HOLDER LATCH BATTERY HOLDER Inside Replace Battery Service Needed Fan System Auto Cool M22111 10 69-1713 Remove the battery holder from the thermostat. Press the battery holder latch to release the battery holder. 3.
Owner's Manual - Page 11

Remove the old batteries and insert two fresh AAA alkaline batteries as marked on the battery holder. BATTERY HOLDER PUSH BATTERIES OUT THROUGH THIS HOLE BATTERY DIRECTION M22017 69-1713 11 Replace Batteries (Cont) 4.
Owner's Manual - Page 13

... batteries as soon as long and can damage the thermostat. 4. 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 if the batteries run down completely. 2. As a precaution, replace the batteries when leaving your heating/cooling system from shutting down completely. 69...
Owner's Manual - Page 14

Built-in Compressor Protection The TH5110D Thermostat has built-in compressor protection (minimum-off timer) that prevents the compressor from restarting too early after the compressor turns off. If there is activated after a shutdown. When the minimum-off timer, the thermostat flashes "Cool On" or "Heat On" a in the display and the compressor and...
Owner's Manual - Page 15

...to Auto. Auto Changeover Auto Changeover is also being adjusted. The thermostat automatically keeps the cool and heat temperature settings three degrees apart (called deadband). The Auto setting appears... only if the thermostat is set to change both air conditioning and heating are adjusting the temperature setting,...
Owner's Manual - Page 16

M22113 The Auto setting appears only if the thermostat is set up for Auto Changeover by your heating and air conditioning dealer. 16 69-1713 Auto Changeover (Cont) 1. Press the System button to change the System setting to Auto. Replace Batt Service Needed Cool On Fan System Auto Cool PRESS THE SYSTEM BUTTON TO CHANGE SYSTEM SETTING TO AUTO.
Owner's Manual - Page 18

... Heat/Cool TEMPERATURE SETTING PRESS THIS BUTTON TO RAISE THE TEMPERATURE SETTING PRESS THIS BUTTON TO LOWER THE TEMPERATURE SETTING M22116 18 69-1713 The thermostat then returns to raise or lower the heat temperature setting. 5. Auto Changeover (Cont) 4.
Owner's Manual - Page 19

To order, call your heating and air conditioning dealer or call Honeywell Customer Care at 1-800-468-1502. M22018 69-1713 19 Part number 50000951-001 Battery Holder. Replacement Battery Holder- Replacement Part 1.
Owner's Manual - Page 23

Before calling, please have the thermostat model number and date code available. MODEL NUMBER xxxxxxxx DATE CODE xxxxxx THERMOSTAT BATTERY HOLDER 69-1713 M22047 23 Customer Assistance For assistance with your Honeywell product, please visit www.honeywell.com/yourhome or call Honeywell Customer Care toll free at 1-800-468-1502.
Owner's Manual - Page 24

...replace the product within a reasonable period of incidental or consequential damages, so this product, excluding battery, to be to the following address: Honeywell Return Goods Dock 4 MN10-3860 1885 Douglas Dr N Golden Valley, MN 55422 This warranty does not cover removal or reinstallation...the product is defective or malfunctions, Honeywell shall repair or replace it (at any time during the...
Owner's Manual - Page 25

... rights which vary from state to state. In Canada, write Retail Products ON15-02H, Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V4Z9. 69-1713 25 If you ....warranty lasts, so the above limitation may have any questions concerning this warranty, please write Honeywell Customer Relations, 1985 Douglas Dr, Golden Valley, MN 55422 or call 1-800-4681502. ...
Owner's Manual - Page 28

Automation and Control Solutions Honeywell International Inc. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9 69-1713 G.H. 5-04 www.honeywell.com/yourhome

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