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How to replace the hot surface ignitor in my Coleman TG9S Gas Furnace?

Replacing the hot surface ignitor in your Coleman TG9S Gas Furnace is a task that you can perform yourself if you have some DIY skills and are comfortable working with HVAC equipment. The hot surface ignitor is a crucial component responsible for lighting the gas burner, and if it fails, it can result in a loss of heating. Here's a step-by-step guide on how to replace the hot surface ignitor:

1. Safety Precautions:
Safety should always be your top priority when working on HVAC equipment. Turn off the power to the furnace at the circuit breaker or disconnect switch to prevent electrical accidents. Also, shut off the gas supply to the furnace.
2. Gather Necessary Tools and Equipment:
Before you begin, make sure you have all the required tools and equipment, including a replacement hot surface ignitor that matches the specifications of your Coleman TG9S Gas Furnace.
3. Locate the Existing Hot Surface Ignitor:
The hot surface ignitor is typically located near the burners inside the furnace. It will be connected to wires and mounted in a bracket or housing.
4. Disconnect Wires:
Carefully disconnect the wires that are connected to the existing hot surface ignitor. Typically, there will be two wires – one connecting to each end of the ignitor. Note the wire colors and their positions for proper reconnection.
5. Remove the Old Hot Surface Ignitor:
Depending on the furnace model, the ignitor may be held in place with screws or clips. Remove any fasteners securing the ignitor and carefully extract it from its housing.
6. Install the New Hot Surface Ignitor:
Place the new hot surface ignitor in the same position as the old one. Ensure that it is correctly aligned with the burners and properly seated. Secure it in place with the screws or clips.
7. Reconnect Wires:
Reconnect the wires to the new hot surface ignitor. Make sure to match the wire colors and positions as noted earlier.
8. Inspect for Proper Placement:
Double-check that the new ignitor is correctly positioned and aligned with the burners. It should be close enough to ignite the gas when it heats up.
9. Turn on the Gas Supply:
Turn on the gas supply to the furnace.
10. Restore Power:
Turn the power back on at the circuit breaker or disconnect switch.
11. Test the Furnace:
Set your thermostat to call for heat and observe the furnace's operation. The hot surface ignitor should start to glow as it heats up to ignite the gas. Listen for the sound of the burners lighting.
12. Monitor for Proper Operation:
Observe the furnace as it runs to ensure that it is heating your home correctly. Check for any unusual noises, smells, or performance issues.
13. Replace Access Panels:
Once you are satisfied that the furnace is operating correctly, replace any access panels or covers that were removed.
14. Dispose of the Old Ignitor:
Dispose of the old hot surface ignitor according to local regulations and environmental guidelines.

Remember to follow safety precautions throughout the process and, if you have any doubts or concerns, consider seeking the assistance of a professional HVAC technician. Replacing a hot surface ignitor in a gas furnace is a relatively straightforward DIY task, but it's essential to do it correctly to ensure the safe and efficient operation of your heating system.
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