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The CT87K thermostat is a common type of thermostat used in many homes. If you are experiencing issues with your CT87K thermostat, here are some troubleshooting steps you can take:
1. Check the power: Make sure the thermostat has power by checking the batteries or the wiring connections.
2. Verify the settings: Ensure that the thermostat is set to the correct mode (heat or cool) and the desired temperature is set correctly.
3. Check the wiring: Inspect the wiring connections to ensure they are secure and not damaged.
4. Clean the thermostat: Remove any dust or debris from the thermostat using a soft cloth or brush.
5. Reset the thermostat: Try resetting the thermostat to its factory settings and reprogramming it.
If these troubleshooting steps do not resolve the issue, it may be necessary to contact a professional HVAC technician for further assistance.
Not everything in today’s world is digital. According to Honeywell, the CT87K thermostat is the most popular thermostat model found in homes worldwide. This simple white round device has two temperature bands – one for setting and one for room temperature. Unlike newer programmable smart thermostats, the CT87K can only control a furnace and requires only two or three wires for installation, limiting troubleshooting options.
Check the Wiring
Ensure that the thermostat is wired correctly and that the connections are secure. The CT87K is designed for limited setups, typically controlling a furnace with two wires – red and white. If you have additional wires, you may need to replace the CT87K with a thermostat that offers more terminals and controls.
Inspect for Damage
Examine the internal components of the thermostat. Although the CT87K sits flush against the wall, it may have been accidentally damaged, such as during a game or furniture moving. Strong impact can cause the thermostat to become unlevel, resulting in discrepancies between the set temperature and the actual room temperature.
Use a level to correct any alignment issues. Look for broken plastic, loose screws, or foreign objects. Check the bimetal coil, a curved strip made of two metals that expand at different rates to determine room temperature, for any signs of damage or unraveling. Tighten screws and remove dust or debris if necessary, but if any significant damage is found, a new thermostat may be required.
Listen for the Click
Turn the dial on the CT87K thermostat to increase the temperature setting. This step will help determine if the furnace is receiving the proper activation signal from the thermostat. A clicking sound indicates a successful connection. If the blower does not turn on, it may indicate a larger issue with the furnace itself.
Analyze the Environment
Check if appliances or drafts are affecting the room temperature reading on the thermostat. Take temperature readings in different areas of the home to identify any significant discrepancies. Turn off heat sources near the thermostat, such as an oven or heater, to observe if the temperature drops or if the heat turns on.
If the furnace does not shut off, ensure that windows and doors near the CT87K are closed and locked to prevent drafts. If troubleshooting does not resolve the issue, consider relocating the thermostat to a more central and well-insulated area within the home.
