1. Introduction
This manual provides essential information for the safe and proper installation and operation of the American Standard & Trane TUX100C960C2 OEM Replacement Hot Surface Ignitor. This component is designed as a direct replacement part for various American Standard and Trane furnace units. It is an 80V silicon-nitride ignitor, supplied with a mounting bracket and screws for installation.
For optimal performance and safety, please read these instructions thoroughly before proceeding with installation or maintenance. Retain this manual for future reference.
2. Safety Information
WARNING: Installation and servicing of heating, ventilation, and air conditioning (HVAC) equipment can be hazardous due to electrical components and gas connections. Only qualified service personnel should install, repair, or service HVAC equipment.
- Always disconnect all electrical power to the furnace unit before installing or servicing the ignitor. Failure to do so can result in electrical shock, personal injury, or death.
- Ensure the gas supply to the furnace is turned off before beginning any work.
- Wear appropriate personal protective equipment (PPE), including safety glasses and gloves.
- Handle the ignitor carefully. Silicon-nitride ignitors can be fragile. Avoid touching the ignitor element with bare hands, as oils can shorten its lifespan.
- Verify that the replacement ignitor specifications (voltage, type) match the original ignitor and the furnace requirements.
- All wiring must comply with local and national electrical codes.
3. Package Contents
Upon opening the package, verify that all components are present and undamaged:
- 1x Silicon-Nitride Hot Surface Ignitor (80V)
- 1x Mounting Bracket
- Mounting Screws
- Installation Guide (this document)
Figure 1: Packaging for the American Standard & Trane TUX100C960C2 OEM Replacement Hot Surface Ignitor. The white box indicates the product is a ServiceFirst IGN00145, which is a compatible replacement.
Figure 2: The Silicon-Nitride Hot Surface Ignitor (80V) with its included mounting bracket and wiring harness. The ignitor element is a ceramic rod with a heating coil.
4. Setup and Installation
IMPORTANT: This procedure should only be performed by a qualified HVAC technician. Improper installation can lead to equipment damage, fire, or personal injury.
- Power Disconnection: Turn off all electrical power to the furnace at the main service panel. Turn off the gas supply to the furnace.
- Access the Ignitor: Locate the furnace's burner assembly. The ignitor is typically mounted near the main burners. You may need to remove access panels or the burner assembly cover.
- Disconnect Wiring: Carefully disconnect the electrical wires leading to the old ignitor. Note the wiring configuration if necessary.
- Remove Old Ignitor: Unscrew and remove the old ignitor and its mounting bracket from the furnace.
- Install New Ignitor:
- Attach the new ignitor to the provided mounting bracket using the included screws.
- Mount the new ignitor assembly in the same position as the old one, ensuring it is securely fastened and properly aligned with the burner.
- Ensure the ignitor element is positioned correctly to ignite the gas flow. Refer to the furnace manufacturer's specifications for exact placement.
- Connect Wiring: Connect the new ignitor's electrical wires to the furnace's wiring harness. Ensure connections are secure and correct.
- Reassemble Furnace: Replace any access panels or covers that were removed.
- Restore Power and Gas: Turn on the gas supply to the furnace. Restore electrical power to the furnace at the main service panel.
- Test Operation: Initiate a call for heat to test the furnace operation. Observe the ignitor to ensure it glows and ignites the gas burners properly.
5. Operating Principles
The hot surface ignitor (HSI) is a critical component in modern gas furnaces. When the thermostat calls for heat, the furnace control board sends voltage to the HSI. The silicon-nitride element rapidly heats up to a very high temperature, glowing red hot. Once the ignitor reaches its ignition temperature, the gas valve opens, allowing gas to flow over the hot ignitor, which then ignites the gas. A flame sensor confirms ignition, and the furnace continues its heating cycle. If ignition is not detected, the control board will typically attempt ignition multiple times before entering a lockout state for safety.
6. Maintenance
The TUX100C960C2 ignitor is designed for reliable operation with minimal maintenance. However, regular furnace maintenance by a qualified technician is recommended to ensure the longevity of all components, including the ignitor.
- Annual Inspection: Have your furnace inspected annually by a qualified HVAC technician. They can check the ignitor for signs of wear, cracks, or carbon buildup.
- Cleaning: If carbon buildup is observed on the ignitor, it may indicate an issue with the air-to-fuel mixture or burner cleanliness. Cleaning should be performed by a professional. Avoid abrasive cleaning methods that could damage the ignitor element.
- Avoid Contamination: Do not touch the ignitor element with bare hands. Oils from skin can create hot spots and shorten the ignitor's life.
7. Troubleshooting
If your furnace is not igniting, the ignitor may be a potential cause. Always consult a qualified HVAC technician for diagnosis and repair.
| Symptom | Possible Cause | Action (Professional Recommended) |
|---|---|---|
| Ignitor does not glow | No power to ignitor, faulty ignitor, broken ignitor element, control board issue. | Check for voltage at ignitor. Inspect ignitor for visible damage. Test ignitor resistance. Inspect control board. |
| Ignitor glows but gas does not ignite | Gas valve issue, ignitor not hot enough, ignitor misaligned, dirty burners, flame sensor issue. | Verify gas supply. Check ignitor placement. Clean burners. Inspect and test flame sensor. Test gas valve operation. |
| Furnace cycles on and off rapidly (short cycling) | Could be related to flame sensor, airflow, or other system issues. | This symptom is less directly related to the ignitor itself but can be part of a broader ignition system problem. A full system diagnostic is needed. |
If you suspect a problem with your ignitor or furnace, contact a certified HVAC technician for professional assistance.
8. Specifications
- Product Type: Hot Surface Ignitor (HSI)
- Ignitor Material: Silicon-Nitride
- Voltage: 80V
- Includes: Mounting Bracket, Screws
- Compatibility: OEM Replacement for American Standard and Trane furnace units
- Replaces Part Numbers: IGN104, IGN-104, IGN0104, IGN-0104, IGN00104, IGN117, IGN00117, IGN00145, IGN145, IGN0145, IGN-0145, IGN00117, IGN-0117, IGN0117, A341947P01, A341948P02, and others.
- Manufacturer: Trane Parts
- Model Number: TUX100C960C2
- Item Weight: 13 ounces
- ASIN: B09MWJYFKJ
Figure 3: Official Trane OEM Component stamp, indicating the authenticity and quality of the replacement part.
9. Warranty and Support
Specific warranty details for this OEM replacement part are not provided in this manual. For warranty information, please refer to the documentation provided with your purchase or contact the manufacturer, Trane Parts, directly. For technical support or assistance with installation, it is highly recommended to consult a qualified HVAC professional.
Manufacturer: Trane Parts