The Honeywell CT3200 Owner's Guide provides installation, programming, operation, and troubleshooting instructions for the programmable thermostat.
This guide walks you through installing the CT3200 thermostat, including removing the old unit, mounting the plate, wiring terminals, and installing batteries. It also explains how to set the fuel type and heating system using DIP switches and the fuel switch.
Later sections cover programming schedules, using features such as Hold temperature, and troubleshooting common issues like display errors, wiring problems, and battery failures. Frequently asked questions and warranty information are also included.
| Voltage | 20 to 30 Vac (low voltage) |
|---|---|
| Batteries | Two AA alkaline batteries (Energizer® recommended) |
| Temperature display range | 45 °F (7 °C) to 88 °F (31 °C) |
Press the Hold button; “HLd” appears on the display, then press again to set the desired temperature.
Replace the batteries with fresh ones, ensure the system switch is off, and re‑insert the batteries backward for a few seconds to reset.
Open the battery door with a coin, insert two AA batteries with correct polarity, and close the door.