Carrier 338096-703 Switch
The Carrier 338096-703 is a precision-engineered L165-20F limit switch designed for critical thermal protection in Carrier, Bryant, and Payne gas furnaces. This OEM replacement part functions as a primary safety control, monitoring the internal heat exchanger temperature to prevent equipment damage. As a normally closed HVAC high limit sensor, the circuit is designed to open when temperatures reach the L165 fixed setpoint (165°F), effectively cutting power to the gas valve or heating elements. Once the system cools by 20°F to the reset point of 145°F, the automatic reset limit switch closes to resume normal operation. Built for the rigors of professional furnace repair, this switch features a durable disc-style construction with standard spade terminals for high-amperage switching. Replacing a compromised limit control ensures system reliability and prevents nuisance tripping caused by weakened internal thermal discs or high-resistance electrical connections frequently seen in aging residential HVAC systems.
Key Benefits- Sensing Accuracy: Factory-calibrated for a precise 165°F open temperature to protect the heat exchanger from cracks and overheating.
- Direct Compatibility: Built as a direct-fit OEM furnace part for seamless integration with existing wiring harnesses and mounting footprints.
- Automatic Cycling: Features a reliable 20°F differential, eliminating the need for manual intervention during standard system cooling cycles.
- Industrial Durability: Engineered to withstand the high-vibration environment of a furnace blower housing without premature failure.
What causes a limit switch to trip repeatedly?
Nuisance tripping is often caused by restricted airflow. Before replacing the 338096-703, technicians should inspect the air filter, check for blocked return grilles, and verify that the blower motor is operating at the correct RPM.
Is this switch compatible with other furnace brands?
While primarily used in Carrier and Bryant units, this L165-20F switch can be used in any application requiring an open-on-rise limit at 165°F with a 20°F differential, provided the mounting profile matches.
How do I test the continuity of the L165-20F?
At room temperature, the switch should show 0 ohms of resistance across the terminals. If the circuit is open at ambient temperature, the internal thermal disc is likely stuck or damaged.
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.
Carrier 338096-703 Switch
The Carrier 338096-703 is a precision-engineered L165-20F limit switch designed for critical thermal protection in Carrier, Bryant, and Payne gas furnaces. This OEM replacement part functions as a primary safety control, monitoring the internal heat exchanger temperature to prevent equipment damage. As a normally closed HVAC high limit sensor, the circuit is designed to open when temperatures reach the L165 fixed setpoint (165°F), effectively cutting power to the gas valve or heating elements. Once the system cools by 20°F to the reset point of 145°F, the automatic reset limit switch closes to resume normal operation. Built for the rigors of professional furnace repair, this switch features a durable disc-style construction with standard spade terminals for high-amperage switching. Replacing a compromised limit control ensures system reliability and prevents nuisance tripping caused by weakened internal thermal discs or high-resistance electrical connections frequently seen in aging residential HVAC systems.
Key Benefits- Sensing Accuracy: Factory-calibrated for a precise 165°F open temperature to protect the heat exchanger from cracks and overheating.
- Direct Compatibility: Built as a direct-fit OEM furnace part for seamless integration with existing wiring harnesses and mounting footprints.
- Automatic Cycling: Features a reliable 20°F differential, eliminating the need for manual intervention during standard system cooling cycles.
- Industrial Durability: Engineered to withstand the high-vibration environment of a furnace blower housing without premature failure.
What causes a limit switch to trip repeatedly?
Nuisance tripping is often caused by restricted airflow. Before replacing the 338096-703, technicians should inspect the air filter, check for blocked return grilles, and verify that the blower motor is operating at the correct RPM.
Is this switch compatible with other furnace brands?
While primarily used in Carrier and Bryant units, this L165-20F switch can be used in any application requiring an open-on-rise limit at 165°F with a 20°F differential, provided the mounting profile matches.
How do I test the continuity of the L165-20F?
At room temperature, the switch should show 0 ohms of resistance across the terminals. If the circuit is open at ambient temperature, the internal thermal disc is likely stuck or damaged.
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.
Product Information
Product Information
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Description
The Carrier 338096-703 is a precision-engineered L165-20F limit switch designed for critical thermal protection in Carrier, Bryant, and Payne gas furnaces. This OEM replacement part functions as a primary safety control, monitoring the internal heat exchanger temperature to prevent equipment damage. As a normally closed HVAC high limit sensor, the circuit is designed to open when temperatures reach the L165 fixed setpoint (165°F), effectively cutting power to the gas valve or heating elements. Once the system cools by 20°F to the reset point of 145°F, the automatic reset limit switch closes to resume normal operation. Built for the rigors of professional furnace repair, this switch features a durable disc-style construction with standard spade terminals for high-amperage switching. Replacing a compromised limit control ensures system reliability and prevents nuisance tripping caused by weakened internal thermal discs or high-resistance electrical connections frequently seen in aging residential HVAC systems.
Key Benefits- Sensing Accuracy: Factory-calibrated for a precise 165°F open temperature to protect the heat exchanger from cracks and overheating.
- Direct Compatibility: Built as a direct-fit OEM furnace part for seamless integration with existing wiring harnesses and mounting footprints.
- Automatic Cycling: Features a reliable 20°F differential, eliminating the need for manual intervention during standard system cooling cycles.
- Industrial Durability: Engineered to withstand the high-vibration environment of a furnace blower housing without premature failure.
What causes a limit switch to trip repeatedly?
Nuisance tripping is often caused by restricted airflow. Before replacing the 338096-703, technicians should inspect the air filter, check for blocked return grilles, and verify that the blower motor is operating at the correct RPM.
Is this switch compatible with other furnace brands?
While primarily used in Carrier and Bryant units, this L165-20F switch can be used in any application requiring an open-on-rise limit at 165°F with a 20°F differential, provided the mounting profile matches.
How do I test the continuity of the L165-20F?
At room temperature, the switch should show 0 ohms of resistance across the terminals. If the circuit is open at ambient temperature, the internal thermal disc is likely stuck or damaged.
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.
