Carrier HH18HA586 Limit Switch
The Carrier HH18HA586 Limit Switch is a critical OEM furnace safety control designed to protect heating systems from thermal overruns. This snap-disc limit switch operates on a normally closed circuit, engineered to open when the internal plenum temperature reaches its 225°F trip point, effectively breaking the circuit to the gas valve or ignition control. Once the system cools to 185°F, the automatic reset function closes the switch to restore standard operation. As a Carrier Factory Authorized Part, this component ensures precise calibration and direct-fit compatibility for Carrier, Bryant, and Payne residential furnaces. For technicians troubleshooting intermittent cycles or high-limit trips, verifying the L225-40F specification is vital for maintaining the manufacturer’s intended safety parameters and sequence of operation.
Key Benefits- Ensures furnace overheat protection by monitoring heat exchanger temperatures.
- Features an automatic reset capability to minimize manual service calls after minor thermal events.
- Direct OEM replacement part for guaranteed pin-to-pin compatibility and mounting alignment.
- Specifically calibrated for a 225-degree opening temperature and 40-degree differential.
- Robust bimetallic disc construction provides consistent thermal response and long-cycle reliability.
What causes a Carrier HH18HA586 to trip frequently?
Frequent tripping usually indicates restricted airflow due to a dirty filter, blocked return vents, or a failing blower motor, causing the heat exchanger to reach the 225°F limit.
Is the HH18HA586 a manual or automatic reset switch?
This model is an automatic reset switch. It will re-engage the circuit automatically once the temperature drops below the 185°F threshold.
Can this switch be used in Bryant or Payne equipment?
Yes, as a Factory Authorized Part, it is the standard specification for various models across the Carrier, Bryant, and Payne furnace lineups.
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 HH18HA586 Limit Switch
The Carrier HH18HA586 Limit Switch is a critical OEM furnace safety control designed to protect heating systems from thermal overruns. This snap-disc limit switch operates on a normally closed circuit, engineered to open when the internal plenum temperature reaches its 225°F trip point, effectively breaking the circuit to the gas valve or ignition control. Once the system cools to 185°F, the automatic reset function closes the switch to restore standard operation. As a Carrier Factory Authorized Part, this component ensures precise calibration and direct-fit compatibility for Carrier, Bryant, and Payne residential furnaces. For technicians troubleshooting intermittent cycles or high-limit trips, verifying the L225-40F specification is vital for maintaining the manufacturer’s intended safety parameters and sequence of operation.
Key Benefits- Ensures furnace overheat protection by monitoring heat exchanger temperatures.
- Features an automatic reset capability to minimize manual service calls after minor thermal events.
- Direct OEM replacement part for guaranteed pin-to-pin compatibility and mounting alignment.
- Specifically calibrated for a 225-degree opening temperature and 40-degree differential.
- Robust bimetallic disc construction provides consistent thermal response and long-cycle reliability.
What causes a Carrier HH18HA586 to trip frequently?
Frequent tripping usually indicates restricted airflow due to a dirty filter, blocked return vents, or a failing blower motor, causing the heat exchanger to reach the 225°F limit.
Is the HH18HA586 a manual or automatic reset switch?
This model is an automatic reset switch. It will re-engage the circuit automatically once the temperature drops below the 185°F threshold.
Can this switch be used in Bryant or Payne equipment?
Yes, as a Factory Authorized Part, it is the standard specification for various models across the Carrier, Bryant, and Payne furnace lineups.
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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Shipping & Returns
Description
The Carrier HH18HA586 Limit Switch is a critical OEM furnace safety control designed to protect heating systems from thermal overruns. This snap-disc limit switch operates on a normally closed circuit, engineered to open when the internal plenum temperature reaches its 225°F trip point, effectively breaking the circuit to the gas valve or ignition control. Once the system cools to 185°F, the automatic reset function closes the switch to restore standard operation. As a Carrier Factory Authorized Part, this component ensures precise calibration and direct-fit compatibility for Carrier, Bryant, and Payne residential furnaces. For technicians troubleshooting intermittent cycles or high-limit trips, verifying the L225-40F specification is vital for maintaining the manufacturer’s intended safety parameters and sequence of operation.
Key Benefits- Ensures furnace overheat protection by monitoring heat exchanger temperatures.
- Features an automatic reset capability to minimize manual service calls after minor thermal events.
- Direct OEM replacement part for guaranteed pin-to-pin compatibility and mounting alignment.
- Specifically calibrated for a 225-degree opening temperature and 40-degree differential.
- Robust bimetallic disc construction provides consistent thermal response and long-cycle reliability.
What causes a Carrier HH18HA586 to trip frequently?
Frequent tripping usually indicates restricted airflow due to a dirty filter, blocked return vents, or a failing blower motor, causing the heat exchanger to reach the 225°F limit.
Is the HH18HA586 a manual or automatic reset switch?
This model is an automatic reset switch. It will re-engage the circuit automatically once the temperature drops below the 185°F threshold.
Can this switch be used in Bryant or Payne equipment?
Yes, as a Factory Authorized Part, it is the standard specification for various models across the Carrier, Bryant, and Payne furnace lineups.
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.
