Description
Ensure dependable freeze protection for your HVAC or refrigeration system with the Carrier HH18HB031 Freeze Thermostat. This factory-authorized part is designed to reliably detect low-temperature conditions and prevent system damage caused by freezing or frost accumulation. Built to OEM specifications by Carrier, this thermostat delivers consistent performance, long-term durability, and seamless compatibility with a range of Carrier, Bryant and Payne systems.
Key Features
- Specifically calibrated for freeze protection – The HH18HB031 is a single-pole, single-throw (SPST) thermostat that opens at approximately 30 °F and closes at around 45 °F, offering a reliable threshold for low-temperature cut-off.
- OEM quality for proper fit and reliable operation – As a genuine Carrier part, it ensures system performance and helps maintain original equipment compatibility.
- Protects against freeze-up and damage – Ideal for heating, ventilation, and refrigeration systems that require control of freezing conditions to avoid costly downtime or component failure.
- Easy to install & maintain – Designed for direct replacement in compatible systems, saving time and helping streamline service work.











