Honeywell T8665D User Manuals

Table of Contents

• Introduction

  3
• Using this Guide

  4
  • Keyboard and Display Description

    4
• Thermostat Features

  7
  • Special Energy Saving Features

    8
• Operating Your Thermostat

  11
• Setting the Clock

  12
  • Setting Current Day and Time

    12
  • Setting System and Fan Keys

    14
  • Setting Temporary Temperatures

    16
  • Using the i (Information) Key

    21
  • Filter Indicator

    23
  • LED Indicators (T8665D Only)

    24
  • Successful Communication Indicator

    25
• Programming Your Thermostat

  25
  • 7-Day Program and Operation

    25
• Replacing the Batteries (T8665C Only)

  38
• Adaptive Intelligent Recovery™ Control

  40
  • Optimum Comfort and Energy Savings

    41
• Troubleshooting (Table 3)

  43
• Warranty

  50
• Customer Assistance

  51