Carrier HK06MB021 Pressure Switch
The Carrier HK06MB021 Dual Pressure Switch is the primary OEM replacement part for the now-obsolete HK06NB021. Engineered for Carrier, Bryant, and Payne HVAC units, this factory-authorized component manages critical safety parameters by monitoring induced draft blower performance and refrigerant line pressures. Calibrated to a specific -0.78 W.C. pressure setting, this differential pressure switch prevents the heating or cooling cycle from continuing under unsafe venting conditions or insufficient airflow. As a genuine Carrier part, it ensures direct fitment and restores original factory specifications to the system's safety circuit.
Key Technical Benefits:
- Direct Replacement Logic: Specifically designed to supersede HK06NB021, ensuring compatibility with integrated furnace control boards.
- Precise Set-Point Monitoring: Factory-set at -0.78 inches of water column for accurate combustion air pressure sensing.
- Dual Switch Functionality: Provides comprehensive monitoring across multiple pressure thresholds to protect the heat exchanger and compressor.
- Reliable HVAC Safety: Acts as a fail-safe mechanism to interrupt power to the gas valve or contactor if pressure drops below required levels.
- OEM Construction: Built to withstand the high-temperature environments found in residential and commercial furnaces.
Common Technical Questions:
Is the HK06MB021 compatible with my current unit?
This dual pressure switch is the designated replacement for part number HK06NB021. If your technical manual specifies either number, this is the correct OEM component for your HVAC repair.
What does the -0.78 setting indicate?
The -0.78 W.C. (Water Column) rating is the specific negative pressure threshold required to close the switch contacts. If the inducer motor fails to pull this vacuum, the system will lockout to prevent carbon monoxide or combustion issues.
Can I use a universal pressure switch instead?
Using a genuine Carrier HK06MB021 is recommended over universal alternatives because it matches the exact electrical rating and pressure calibration required by the manufacturer's safety sequence of operation.
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: $72.30
-65%$72.30
$25.30Carrier HK06MB021 Pressure Switch
The Carrier HK06MB021 Dual Pressure Switch is the primary OEM replacement part for the now-obsolete HK06NB021. Engineered for Carrier, Bryant, and Payne HVAC units, this factory-authorized component manages critical safety parameters by monitoring induced draft blower performance and refrigerant line pressures. Calibrated to a specific -0.78 W.C. pressure setting, this differential pressure switch prevents the heating or cooling cycle from continuing under unsafe venting conditions or insufficient airflow. As a genuine Carrier part, it ensures direct fitment and restores original factory specifications to the system's safety circuit.
Key Technical Benefits:
- Direct Replacement Logic: Specifically designed to supersede HK06NB021, ensuring compatibility with integrated furnace control boards.
- Precise Set-Point Monitoring: Factory-set at -0.78 inches of water column for accurate combustion air pressure sensing.
- Dual Switch Functionality: Provides comprehensive monitoring across multiple pressure thresholds to protect the heat exchanger and compressor.
- Reliable HVAC Safety: Acts as a fail-safe mechanism to interrupt power to the gas valve or contactor if pressure drops below required levels.
- OEM Construction: Built to withstand the high-temperature environments found in residential and commercial furnaces.
Common Technical Questions:
Is the HK06MB021 compatible with my current unit?
This dual pressure switch is the designated replacement for part number HK06NB021. If your technical manual specifies either number, this is the correct OEM component for your HVAC repair.
What does the -0.78 setting indicate?
The -0.78 W.C. (Water Column) rating is the specific negative pressure threshold required to close the switch contacts. If the inducer motor fails to pull this vacuum, the system will lockout to prevent carbon monoxide or combustion issues.
Can I use a universal pressure switch instead?
Using a genuine Carrier HK06MB021 is recommended over universal alternatives because it matches the exact electrical rating and pressure calibration required by the manufacturer's safety sequence of operation.
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
Shipping & Returns
Shipping & Returns
Description
The Carrier HK06MB021 Dual Pressure Switch is the primary OEM replacement part for the now-obsolete HK06NB021. Engineered for Carrier, Bryant, and Payne HVAC units, this factory-authorized component manages critical safety parameters by monitoring induced draft blower performance and refrigerant line pressures. Calibrated to a specific -0.78 W.C. pressure setting, this differential pressure switch prevents the heating or cooling cycle from continuing under unsafe venting conditions or insufficient airflow. As a genuine Carrier part, it ensures direct fitment and restores original factory specifications to the system's safety circuit.
Key Technical Benefits:
- Direct Replacement Logic: Specifically designed to supersede HK06NB021, ensuring compatibility with integrated furnace control boards.
- Precise Set-Point Monitoring: Factory-set at -0.78 inches of water column for accurate combustion air pressure sensing.
- Dual Switch Functionality: Provides comprehensive monitoring across multiple pressure thresholds to protect the heat exchanger and compressor.
- Reliable HVAC Safety: Acts as a fail-safe mechanism to interrupt power to the gas valve or contactor if pressure drops below required levels.
- OEM Construction: Built to withstand the high-temperature environments found in residential and commercial furnaces.
Common Technical Questions:
Is the HK06MB021 compatible with my current unit?
This dual pressure switch is the designated replacement for part number HK06NB021. If your technical manual specifies either number, this is the correct OEM component for your HVAC repair.
What does the -0.78 setting indicate?
The -0.78 W.C. (Water Column) rating is the specific negative pressure threshold required to close the switch contacts. If the inducer motor fails to pull this vacuum, the system will lockout to prevent carbon monoxide or combustion issues.
Can I use a universal pressure switch instead?
Using a genuine Carrier HK06MB021 is recommended over universal alternatives because it matches the exact electrical rating and pressure calibration required by the manufacturer's safety sequence of operation.
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.
