Carrier HH18HA508 – 120–160°F Auto Limit Switch

The Carrier HH18HA508 is a genuine OEM auto limit switch designed for use in Carrier, Bryant, and Payne gas-fired furnaces. This safety component monitors internal furnace temperatures and interrupts burner operation when temperatures exceed safe limits, preventing overheating and potential damage to the system. The switch operates within a temperature range of 120°F to 160°F, ensuring optimal furnace performance and safety.

Key Features

• Temperature Range: Opens at approximately 160°F and closes at approximately 120°F, providing precise thermal control.
• Auto Reset Function: Automatically resets after the furnace cools down, reducing the need for manual intervention.
• Compact Design: Small footprint allows for easy installation in tight spaces.
• OEM Quality: Manufactured to meet Carrier’s original specifications, ensuring compatibility and reliability.
• Replaces Part Numbers: Serves as a direct replacement for HH18HA508A and 1NT01L-4577.