1. Introduction
This manual provides essential information for the proper installation, operation, maintenance, and troubleshooting of the Trane Furnace Flame Sensor, model PSE-T19. This component is a critical safety device designed to ensure the safe and efficient operation of your furnace. Please read this manual thoroughly before attempting any procedures.
2. Safety Information
WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury, or death. Read the installation, operating, and maintenance instructions thoroughly before installing or servicing this equipment.
- Always disconnect electrical power to the furnace before performing any service or maintenance.
- Working with gas appliances can be hazardous. If you are not qualified to perform these procedures, contact a certified HVAC technician.
- Wear appropriate personal protective equipment (PPE), such as gloves and eye protection.
- Ensure all gas connections are properly sealed and tested for leaks after any work involving gas lines.
- Do not bypass any safety devices.
3. Product Overview
The flame sensor is a safety device in a gas furnace that detects the presence of a flame in the burner assembly. If the sensor does not detect a flame after the gas valve opens, it signals the furnace control board to shut off the gas supply, preventing unburnt gas from accumulating. This specific sensor is an upgraded replacement for Trane part number SEN01114.
Figure 1: Trane Furnace Flame Sensor PSE-T19
This image displays the Trane Furnace Flame Sensor PSE-T19. It features a white ceramic insulator body, a metal mounting bracket with a screw hole, and a metal rod that extends into the flame path to detect the presence of a flame.
4. Setup and Installation
Installation of the flame sensor should only be performed by a qualified technician. The following steps are for informational purposes only.
- Disconnect Power: Turn off all electrical power to the furnace at the main service panel.
- Locate Sensor: Identify the existing flame sensor. It is typically a single metal rod positioned in the flame path of the burner assembly, often secured by one screw.
- Remove Old Sensor: Carefully disconnect the wire leading to the sensor. Remove the screw holding the sensor in place and gently pull the old sensor out.
- Install New Sensor: Insert the new Trane PSE-T19 flame sensor into the same position. Ensure the metal rod is correctly positioned to be enveloped by the flame during operation. Secure it with the mounting screw.
- Connect Wiring: Reconnect the wire to the new flame sensor. Ensure the connection is secure.
- Restore Power: Turn on the electrical power to the furnace.
- Test Operation: Initiate a heating cycle and observe the furnace's ignition sequence. The main burners should ignite and remain lit.
5. Operating Principles
When the furnace calls for heat, the igniter heats up, and the gas valve opens. As the gas ignites, the flame sensor, which is a small metal rod, becomes exposed to the flame. The flame rectifies a small alternating current (AC) into a direct current (DC) signal. This DC signal is sent to the furnace's control board, confirming the presence of a flame. If the control board does not receive this signal within a few seconds of ignition, it will shut off the gas supply as a safety measure, preventing unburnt gas from accumulating in the combustion chamber.
6. Maintenance
Regular maintenance of the flame sensor is crucial for reliable furnace operation. A dirty flame sensor is a common cause of furnace malfunctions.
- Cleaning: Annually, or if experiencing ignition issues, carefully remove the flame sensor. Use fine-grit sandpaper or steel wool to gently clean off any carbon buildup or oxidation from the ceramic insulator and the metal rod. Do not use harsh chemicals or abrasive cleaners that could damage the sensor.
- Inspection: While cleaning, inspect the sensor for any signs of physical damage, such as cracks in the ceramic, corrosion, or a bent rod. Replace the sensor if any damage is observed.
- Reinstallation: Reinstall the cleaned sensor, ensuring it is securely mounted and the wire connection is tight.
7. Troubleshooting
If your furnace is experiencing issues related to ignition or short cycling, the flame sensor may be a contributing factor.
- Furnace Ignites, then Shuts Off (Short Cycling): This is a classic symptom of a dirty or faulty flame sensor. The sensor detects the flame initially but then loses the signal, causing the furnace to shut down.
- Furnace Fails to Ignite: While many factors can cause this, a completely failed flame sensor can prevent the furnace from even attempting to keep the gas valve open.
Troubleshooting Steps:
- Clean the Flame Sensor: Follow the cleaning instructions in Section 6. This resolves most flame sensor-related issues.
- Check Wiring: Ensure the wire connecting the flame sensor to the control board is secure and free from damage.
- Inspect for Damage: Look for any visible damage to the sensor itself.
- Test for Continuity (Advanced): A qualified technician can use a multimeter to test the sensor's continuity and signal output.
- Replace Sensor: If cleaning and inspection do not resolve the issue, and the sensor is suspected to be faulty, replace it with a new Trane PSE-T19 or equivalent part.
8. Specifications
| Attribute | Value |
|---|---|
| Model Number | PSE-T19 (SEN01114_v4) |
| Manufacturer | Trane |
| Product Dimensions | 6 x 6 x 6 inches |
| Item Weight | 0.53 ounces |
| ASIN | B00ECEERIG |
9. Warranty Information
Warranty coverage for the Trane Furnace Flame Sensor PSE-T19 is typically provided by the seller or manufacturer at the time of purchase. Please refer to your purchase documentation or contact the original point of sale for specific warranty terms and conditions.
10. Support
For technical assistance, installation guidance, or troubleshooting beyond the scope of this manual, please contact the seller or a qualified HVAC professional. Ensure you have your product model number (PSE-T19 or SEN01114_v4) and purchase details available when seeking support.
