Trane THT2438 Limit Switch
The Trane THT2438 Limit Switch is a critical safety component engineered for high-limit protection in residential and commercial Trane HVAC systems. This OEM replacement part is built to precise tolerances, featuring a 210°F open and 180°F close (210Op 180Cl) temperature setpoint. As a fixed temperature limit control, it monitors the blower housing or heat exchanger ambient air. If the system detects a thermal overload reaching the 210°F threshold, the switch breaks the electrical circuit, immediately shutting down the burners or heating elements to prevent equipment damage or hazardous conditions. Once the temperature drops to a safe 180°F, the auto-reset function restores continuity. Its SPDT (Single Pole Double Throw) configuration ensures robust electrical switching and reliable integration into existing furnace or air handler control boards. For field technicians, verifying the THT2438 part number and temperature specs is essential for maintaining HVAC safety switch compliance and system uptime.
Key Benefits- OEM Precision: Genuine Trane THT2438 ensures direct fitment and exact 210°F/180°F calibration for furnace safety.
- Automatic Reset: Self-correcting high limit control restores system operation once temperature reaches the 180°F reset point.
- Thermal Protection: Prevents heat exchanger cracking and component melting by interrupting the power supply during overheating events.
- Standard Mounting: Designed for rapid installation on blower decks or partition plates using standard mounting footprints.
What causes a Trane THT2438 to trip?
Most trips occur due to restricted airflow, such as a clogged filter, blocked return vents, or a failing blower motor. If the limit switch stays open, it indicates a safety shutdown to prevent internal overheating.
Is the THT2438 an auto-reset or manual reset switch?
This is an automatic reset limit switch. It will close the circuit and allow the unit to fire again once the sensor cools to 180°F.
How do I test the continuity of this limit switch?
Using a multimeter set to Ohms, check for continuity across the terminals at room temperature. The THT2438 is normally closed; if it shows "Open" or "OL" while cool, the internal bimetal disc has failed and requires replacement.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $122.79
-65%$122.79
$42.98Trane THT2438 Limit Switch
The Trane THT2438 Limit Switch is a critical safety component engineered for high-limit protection in residential and commercial Trane HVAC systems. This OEM replacement part is built to precise tolerances, featuring a 210°F open and 180°F close (210Op 180Cl) temperature setpoint. As a fixed temperature limit control, it monitors the blower housing or heat exchanger ambient air. If the system detects a thermal overload reaching the 210°F threshold, the switch breaks the electrical circuit, immediately shutting down the burners or heating elements to prevent equipment damage or hazardous conditions. Once the temperature drops to a safe 180°F, the auto-reset function restores continuity. Its SPDT (Single Pole Double Throw) configuration ensures robust electrical switching and reliable integration into existing furnace or air handler control boards. For field technicians, verifying the THT2438 part number and temperature specs is essential for maintaining HVAC safety switch compliance and system uptime.
Key Benefits- OEM Precision: Genuine Trane THT2438 ensures direct fitment and exact 210°F/180°F calibration for furnace safety.
- Automatic Reset: Self-correcting high limit control restores system operation once temperature reaches the 180°F reset point.
- Thermal Protection: Prevents heat exchanger cracking and component melting by interrupting the power supply during overheating events.
- Standard Mounting: Designed for rapid installation on blower decks or partition plates using standard mounting footprints.
What causes a Trane THT2438 to trip?
Most trips occur due to restricted airflow, such as a clogged filter, blocked return vents, or a failing blower motor. If the limit switch stays open, it indicates a safety shutdown to prevent internal overheating.
Is the THT2438 an auto-reset or manual reset switch?
This is an automatic reset limit switch. It will close the circuit and allow the unit to fire again once the sensor cools to 180°F.
How do I test the continuity of this limit switch?
Using a multimeter set to Ohms, check for continuity across the terminals at room temperature. The THT2438 is normally closed; if it shows "Open" or "OL" while cool, the internal bimetal disc has failed and requires replacement.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Trane THT2438 Limit Switch is a critical safety component engineered for high-limit protection in residential and commercial Trane HVAC systems. This OEM replacement part is built to precise tolerances, featuring a 210°F open and 180°F close (210Op 180Cl) temperature setpoint. As a fixed temperature limit control, it monitors the blower housing or heat exchanger ambient air. If the system detects a thermal overload reaching the 210°F threshold, the switch breaks the electrical circuit, immediately shutting down the burners or heating elements to prevent equipment damage or hazardous conditions. Once the temperature drops to a safe 180°F, the auto-reset function restores continuity. Its SPDT (Single Pole Double Throw) configuration ensures robust electrical switching and reliable integration into existing furnace or air handler control boards. For field technicians, verifying the THT2438 part number and temperature specs is essential for maintaining HVAC safety switch compliance and system uptime.
Key Benefits- OEM Precision: Genuine Trane THT2438 ensures direct fitment and exact 210°F/180°F calibration for furnace safety.
- Automatic Reset: Self-correcting high limit control restores system operation once temperature reaches the 180°F reset point.
- Thermal Protection: Prevents heat exchanger cracking and component melting by interrupting the power supply during overheating events.
- Standard Mounting: Designed for rapid installation on blower decks or partition plates using standard mounting footprints.
What causes a Trane THT2438 to trip?
Most trips occur due to restricted airflow, such as a clogged filter, blocked return vents, or a failing blower motor. If the limit switch stays open, it indicates a safety shutdown to prevent internal overheating.
Is the THT2438 an auto-reset or manual reset switch?
This is an automatic reset limit switch. It will close the circuit and allow the unit to fire again once the sensor cools to 180°F.
How do I test the continuity of this limit switch?
Using a multimeter set to Ohms, check for continuity across the terminals at room temperature. The THT2438 is normally closed; if it shows "Open" or "OL" while cool, the internal bimetal disc has failed and requires replacement.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
