Carrier HH18HA505 Limit Switch
The Carrier HH18HA505 Limit Switch is a critical OEM furnace safety component designed for precise thermal monitoring in Carrier, Bryant, and Payne residential heating systems. This high-limit rollout switch is engineered to open the electrical circuit at a factory-set threshold of 235 °F, effectively preventing heat exchanger damage and unsafe operating conditions. Once the temperature stabilizes and cools to 195 °F, the switch utilizes an automatic reset function to restore normal furnace operation without manual interference. As a genuine factory-original replacement part, it ensures identical mounting footprints and electrical response times compared to the factory-installed unit. Utilizing this HVAC high limit switch maintains the integrity of the furnace safety string, providing contractors with a reliable solution for correcting frequent cycling or limit switch tripping issues caused by restricted airflow or secondary heat exchanger malfunctions.
Key Benefit List
- Precision Thermal Calibration: Engineered to trip at 235 °F and reset at 195 °F for consistent furnace overheat protection.
- Direct OEM Compatibility: Ensures a drop-in fit for specific Carrier, Bryant, and Payne air handlers and gas furnaces.
- Automatic Reset Logic: Eliminates unnecessary service calls by automatically closing the circuit once the system returns to safe parameters.
- Rigid Build Standards: Manufactured to HH18HA505 specifications to withstand high-cycle environments within the burner vestibule.
- Lightweight Form Factor: The 0.02 lb design allows for easy installation in tight manifold and rollout bracket configurations.
Common Questions
What causes a Carrier HH18HA505 to trip?
This rollout switch typically opens due to restricted airflow from a dirty filter, a failing blower motor, or a cracked heat exchanger causing flame rollout. Professional diagnosis of the airflow velocity and static pressure is recommended.
Is the HH18HA505 a manual or automatic reset switch?
The HH18HA505 is an automatic reset limit switch. It will automatically re-engage the heating circuit once the sensor temperature drops below the 195 °F reset point.
Can I replace this with a higher temperature rated switch?
No. Safety switches must match the manufacturer's specified temperature rating to prevent heat exchanger fatigue. Always replace an HVAC limit switch with the exact OEM part number to ensure system safety.
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: $10.78
-65%$10.78
$3.77Carrier HH18HA505 Limit Switch
The Carrier HH18HA505 Limit Switch is a critical OEM furnace safety component designed for precise thermal monitoring in Carrier, Bryant, and Payne residential heating systems. This high-limit rollout switch is engineered to open the electrical circuit at a factory-set threshold of 235 °F, effectively preventing heat exchanger damage and unsafe operating conditions. Once the temperature stabilizes and cools to 195 °F, the switch utilizes an automatic reset function to restore normal furnace operation without manual interference. As a genuine factory-original replacement part, it ensures identical mounting footprints and electrical response times compared to the factory-installed unit. Utilizing this HVAC high limit switch maintains the integrity of the furnace safety string, providing contractors with a reliable solution for correcting frequent cycling or limit switch tripping issues caused by restricted airflow or secondary heat exchanger malfunctions.
Key Benefit List
- Precision Thermal Calibration: Engineered to trip at 235 °F and reset at 195 °F for consistent furnace overheat protection.
- Direct OEM Compatibility: Ensures a drop-in fit for specific Carrier, Bryant, and Payne air handlers and gas furnaces.
- Automatic Reset Logic: Eliminates unnecessary service calls by automatically closing the circuit once the system returns to safe parameters.
- Rigid Build Standards: Manufactured to HH18HA505 specifications to withstand high-cycle environments within the burner vestibule.
- Lightweight Form Factor: The 0.02 lb design allows for easy installation in tight manifold and rollout bracket configurations.
Common Questions
What causes a Carrier HH18HA505 to trip?
This rollout switch typically opens due to restricted airflow from a dirty filter, a failing blower motor, or a cracked heat exchanger causing flame rollout. Professional diagnosis of the airflow velocity and static pressure is recommended.
Is the HH18HA505 a manual or automatic reset switch?
The HH18HA505 is an automatic reset limit switch. It will automatically re-engage the heating circuit once the sensor temperature drops below the 195 °F reset point.
Can I replace this with a higher temperature rated switch?
No. Safety switches must match the manufacturer's specified temperature rating to prevent heat exchanger fatigue. Always replace an HVAC limit switch with the exact OEM part number to ensure system safety.
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 HH18HA505 Limit Switch is a critical OEM furnace safety component designed for precise thermal monitoring in Carrier, Bryant, and Payne residential heating systems. This high-limit rollout switch is engineered to open the electrical circuit at a factory-set threshold of 235 °F, effectively preventing heat exchanger damage and unsafe operating conditions. Once the temperature stabilizes and cools to 195 °F, the switch utilizes an automatic reset function to restore normal furnace operation without manual interference. As a genuine factory-original replacement part, it ensures identical mounting footprints and electrical response times compared to the factory-installed unit. Utilizing this HVAC high limit switch maintains the integrity of the furnace safety string, providing contractors with a reliable solution for correcting frequent cycling or limit switch tripping issues caused by restricted airflow or secondary heat exchanger malfunctions.
Key Benefit List
- Precision Thermal Calibration: Engineered to trip at 235 °F and reset at 195 °F for consistent furnace overheat protection.
- Direct OEM Compatibility: Ensures a drop-in fit for specific Carrier, Bryant, and Payne air handlers and gas furnaces.
- Automatic Reset Logic: Eliminates unnecessary service calls by automatically closing the circuit once the system returns to safe parameters.
- Rigid Build Standards: Manufactured to HH18HA505 specifications to withstand high-cycle environments within the burner vestibule.
- Lightweight Form Factor: The 0.02 lb design allows for easy installation in tight manifold and rollout bracket configurations.
Common Questions
What causes a Carrier HH18HA505 to trip?
This rollout switch typically opens due to restricted airflow from a dirty filter, a failing blower motor, or a cracked heat exchanger causing flame rollout. Professional diagnosis of the airflow velocity and static pressure is recommended.
Is the HH18HA505 a manual or automatic reset switch?
The HH18HA505 is an automatic reset limit switch. It will automatically re-engage the heating circuit once the sensor temperature drops below the 195 °F reset point.
Can I replace this with a higher temperature rated switch?
No. Safety switches must match the manufacturer's specified temperature rating to prevent heat exchanger fatigue. Always replace an HVAC limit switch with the exact OEM part number to ensure system safety.
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.
