Carrier HH12ZZ190 Limit Switch
The Carrier HH12ZZ190 Limit Switch is a critical safety component designed for precise thermal monitoring in residential gas furnaces. Engineered as a normally closed (NC) high-limit control, this genuine OEM replacement part features a 190°F fixed set point and a 40°F differential. This means the circuit opens on a temperature rise at 190°F to prevent heat exchanger damage and automatically resets when the temperature drops to 150°F. Reliable thermal protection is essential for preventing furnace short cycling and blower-only operation caused by overheating conditions. This switch is a direct replacement for Carrier, Bryant, and Payne models, including the 59SC2 and 912SC series. Its 2-inch insert length and L190F-40 specification ensure a factory-authorized fit within tight control compartments. For technicians servicing air handlers or furnaces, installing an automatic reset limit switch like the HH12ZZ190 restores the primary safety string to manufacturer specifications, ensuring long-term system integrity and reliable ignition sequences.
Key Benefit List:
- Factory-Calibrated Precision: Features a fixed 190°F opening temperature to ensure the system shuts down before the heat exchanger reaches critical thermal limits.
- Automatic Reset Functionality: The 40°F differential allows the furnace limit switch to close automatically at 150°F, reducing unnecessary service calls for manual resets.
- Multi-Brand Compatibility: Specifically engineered for Carrier furnace parts kits, also fitting Bryant and Payne residential gas-fired equipment.
- Durable Construction: Built to withstand the high-temperature environment of the furnace cabinet, maintaining high-limit switch accuracy over thousands of cycles.
Common Questions:
- How do I know if my HH12ZZ190 limit switch is bad? If your furnace blower runs continuously but the burners won't ignite, or if you record an open circuit across the terminals when the system is cool, the switch has likely failed and requires replacement.
- Is the HH12ZZ190 a manual or automatic reset? This is an automatic reset switch. It will restore the electrical path once the plenum temperature drops below 150°F.
- Will this fix a furnace that keeps shutting off? If the furnace high limit switch is tripping due to restricted airflow (like a dirty filter or blocked coil), it is doing its job. However, if airflow is normal and it still trips at low temperatures, the switch may be out of calibration.
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: $26.38
-65%$26.38
$9.23Carrier HH12ZZ190 Limit Switch
The Carrier HH12ZZ190 Limit Switch is a critical safety component designed for precise thermal monitoring in residential gas furnaces. Engineered as a normally closed (NC) high-limit control, this genuine OEM replacement part features a 190°F fixed set point and a 40°F differential. This means the circuit opens on a temperature rise at 190°F to prevent heat exchanger damage and automatically resets when the temperature drops to 150°F. Reliable thermal protection is essential for preventing furnace short cycling and blower-only operation caused by overheating conditions. This switch is a direct replacement for Carrier, Bryant, and Payne models, including the 59SC2 and 912SC series. Its 2-inch insert length and L190F-40 specification ensure a factory-authorized fit within tight control compartments. For technicians servicing air handlers or furnaces, installing an automatic reset limit switch like the HH12ZZ190 restores the primary safety string to manufacturer specifications, ensuring long-term system integrity and reliable ignition sequences.
Key Benefit List:
- Factory-Calibrated Precision: Features a fixed 190°F opening temperature to ensure the system shuts down before the heat exchanger reaches critical thermal limits.
- Automatic Reset Functionality: The 40°F differential allows the furnace limit switch to close automatically at 150°F, reducing unnecessary service calls for manual resets.
- Multi-Brand Compatibility: Specifically engineered for Carrier furnace parts kits, also fitting Bryant and Payne residential gas-fired equipment.
- Durable Construction: Built to withstand the high-temperature environment of the furnace cabinet, maintaining high-limit switch accuracy over thousands of cycles.
Common Questions:
- How do I know if my HH12ZZ190 limit switch is bad? If your furnace blower runs continuously but the burners won't ignite, or if you record an open circuit across the terminals when the system is cool, the switch has likely failed and requires replacement.
- Is the HH12ZZ190 a manual or automatic reset? This is an automatic reset switch. It will restore the electrical path once the plenum temperature drops below 150°F.
- Will this fix a furnace that keeps shutting off? If the furnace high limit switch is tripping due to restricted airflow (like a dirty filter or blocked coil), it is doing its job. However, if airflow is normal and it still trips at low temperatures, the switch may be out of calibration.
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 HH12ZZ190 Limit Switch is a critical safety component designed for precise thermal monitoring in residential gas furnaces. Engineered as a normally closed (NC) high-limit control, this genuine OEM replacement part features a 190°F fixed set point and a 40°F differential. This means the circuit opens on a temperature rise at 190°F to prevent heat exchanger damage and automatically resets when the temperature drops to 150°F. Reliable thermal protection is essential for preventing furnace short cycling and blower-only operation caused by overheating conditions. This switch is a direct replacement for Carrier, Bryant, and Payne models, including the 59SC2 and 912SC series. Its 2-inch insert length and L190F-40 specification ensure a factory-authorized fit within tight control compartments. For technicians servicing air handlers or furnaces, installing an automatic reset limit switch like the HH12ZZ190 restores the primary safety string to manufacturer specifications, ensuring long-term system integrity and reliable ignition sequences.
Key Benefit List:
- Factory-Calibrated Precision: Features a fixed 190°F opening temperature to ensure the system shuts down before the heat exchanger reaches critical thermal limits.
- Automatic Reset Functionality: The 40°F differential allows the furnace limit switch to close automatically at 150°F, reducing unnecessary service calls for manual resets.
- Multi-Brand Compatibility: Specifically engineered for Carrier furnace parts kits, also fitting Bryant and Payne residential gas-fired equipment.
- Durable Construction: Built to withstand the high-temperature environment of the furnace cabinet, maintaining high-limit switch accuracy over thousands of cycles.
Common Questions:
- How do I know if my HH12ZZ190 limit switch is bad? If your furnace blower runs continuously but the burners won't ignite, or if you record an open circuit across the terminals when the system is cool, the switch has likely failed and requires replacement.
- Is the HH12ZZ190 a manual or automatic reset? This is an automatic reset switch. It will restore the electrical path once the plenum temperature drops below 150°F.
- Will this fix a furnace that keeps shutting off? If the furnace high limit switch is tripping due to restricted airflow (like a dirty filter or blocked coil), it is doing its job. However, if airflow is normal and it still trips at low temperatures, the switch may be out of calibration.
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.
