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Honeywell T8112C

Honeywell T8112C
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® U.S. Registered Trademark
© 2004 Honeywell International Inc.
All Rights Reserved
69-0862—4
Electronic Programmable
Thermostat
Owners Manual
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Honeywell T8112C Specifications

General IconGeneral
Temperature Range40°F to 90°F (4°C to 32°C)
Power Source24 Vac
CompatibilitySingle-stage heating and cooling systems
Stages1 Heat/1 Cool
BacklightNo
Battery BackupNo
TypeElectronic
DisplayDigital display
Voltage24V
ProgrammableNon-Programmable

Summary

Programming Your Thermostat

Program Schedule Overview

Introduces programming time and temperature settings for various times of the day.

Setting Time and Day

Instructions for setting the current time and day on the thermostat.

Heating and Cooling Program Setup

Overview of programming the thermostat for heating and cooling schedules.

Operating Your Thermostat

Temporary Temperature Adjustments

Guidance on temporarily changing temperature settings and how they are cancelled.

Managing Programmed Settings

Covers holding temperatures, checking programs, cancelling, and permanently changing settings.

Fan and System Switch Operations

Explanation of fan switch (Auto/On) and system switch (Cool/Off/Heat) positions.

Maintaining Your Thermostat

Installing Batteries

Step-by-step guide for installing new AA alkaline batteries correctly.

Troubleshooting Guide

Display and Battery Issues

Resolves issues with blank displays, incorrect timing, and 'bAtLo' battery indicators.

Temperature Control Problems

Addressing temperature display limits, incorrect changes, and room comfort issues.

System Operation Failures

Troubleshooting for heating or cooling system failures and register output.

Temperature Accuracy and Comfort

Addresses discrepancies between display and actual temperature, and room comfort.

Limited One-Year Warranty

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