Honeywell CT2800A1009 Programming And Installation Instructions

Honeywell CT2800A1009 Programming And Installation Instructions

Weekday/weekend (5-day/2-day) programmable heat and/or cool low voltage (20 to 30 vac) thermostat and mounting plate

Advertisement

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the CT2800A1009 and is the answer not in the manual?

Questions and answers

Oliver
March 22, 2025

Thermostat not turning furnace on what do I do?

1 comments:
Mr. Anderson
March 22, 2025

To troubleshoot a Honeywell CT2800A1009 thermostat that is not turning on the furnace, follow these steps:

1. Check Power Supply
- Ensure the thermostat has power. If it uses batteries, replace them.
- If it's wired to the HVAC system, check the circuit breaker and reset it if needed.

2. Verify Thermostat Settings
- Set the thermostat to "Heat" mode.
- Increase the set temperature above the current room temperature.

3. Inspect the Wiring
- Turn off power to the HVAC system.
- Remove the thermostat cover and check for loose or disconnected wires.
- Ensure wires are correctly connected to the terminals.

4. Test the Thermostat
- Bypass the thermostat by connecting the "R" and "W" wires directly.
- If the furnace turns on, the thermostat may be faulty.

5. Check the Furnace Power and Switch
- Ensure the furnace power switch is ON.
- Inspect the furnace filter; a clogged filter can cause the system to shut down.

6. Reset the Thermostat
- Remove batteries (if applicable) and wait a few minutes before reinserting.
- Turn off the thermostat for a few minutes and turn it back on.

7. Inspect the Furnace Safety Switches
- Some furnaces have a safety switch on the front panel that must be engaged for operation.

8. Check for Error Codes
- If the furnace has a diagnostic LED, check for blinking codes and refer to the furnace manual.

If the issue persists, consult an HVAC professional.

This answer is automatically generated

This manual is also suitable for:

Ct2800a1017Ct2800Magicstat 28

Table of Contents

Save PDF