Description
The Carrier HH18HA504 is a genuine OEM automatic reset limit switch designed for use in select furnaces manufactured by Carrier, Bryant and Payne. Engineered to monitor system temperatures, this limit switch opens the burner control circuit when temperatures exceed its 180-220 °F range and automatically resets once normal operating conditions return.
Key Features
- Temperature Range: Opens at approximately 180 °F and closes at about 140 °F (auto-reset mode) to safeguard against overheating.
- OEM Quality: A Factory Authorized Parts component that ensures exact replacement fit and maintains manufacturer standards.
- Compact & Reliable: Low-profile design (approximately 1.5″ × 1.5″ × 0.8″) with dependable snap-action switching.











