The Carrier HH18HA415 is an OEM temperature switch engineered to provide precise, automatic freeze-protection control in Carrier heating and cooling systems. Designed with a break (open) setpoint of 15°F and a make (close) setpoint of 25°F, this switch monitors ambient or coil temperatures and interrupts or restores circuit operation at the factory-calibrated thresholds — helping prevent costly freeze damage to equipment and components.
Key Features
- Break (Open) Temperature: 15°F — circuit opens to trigger protective action at freezing conditions
- Make (Close) Temperature: 25°F — circuit closes and restores normal operation as temperature rises
- OEM Carrier replacement part for accurate, reliable performance
- Designed for freeze-protection and low-temperature safety applications
- Direct drop-in replacement to minimize installation time and downtime
Applications
- Carrier residential and commercial HVAC systems requiring low-temperature protection
- Freeze-stat and low-ambient control circuits
- Air handling units, heat pumps, and fan coil systems
Why Choose the Carrier HH18HA415?
Using a genuine Carrier OEM temperature switch ensures the switch operates within the exact factory specifications your system was designed around. Aftermarket substitutes may not match the precise break/make differential, potentially leaving equipment vulnerable to freeze damage or nuisance trips. The HH18HA415 delivers the dependable, calibrated switching action that keeps Carrier systems running safely through cold-weather conditions.
