Description
York S1-RLTH-31831 Freeze Stat — Opens 37°F / Closes 49°F
The York S1-RLTH-31831 is an OEM freeze protection thermostat (freeze stat) engineered to safeguard HVAC coils, air handlers, and related equipment from freeze damage. By monitoring air or coil temperatures and triggering a protective response before freezing conditions occur, this control helps prevent costly equipment damage and system downtime.
Key Specifications
- OEM Part Number: S1-RLTH-31831
- Brand: York
- Open (Trip) Temperature: 37°F
- Close (Reset) Temperature: 49°F
- Control Type: Freeze Stat (Low-Limit Thermostat)
- Application: HVAC air handlers, coils, and freeze protection circuits
How It Works
The freeze stat opens its contacts at 37°F, signaling the control system to shut down the unit or activate protective measures such as closing outdoor air dampers or energizing heating elements. Once temperatures recover to 49°F, the contacts close and normal operation resumes. This automatic open/close action provides reliable, hands-free freeze protection.
Benefits
- Protects coils and heat exchangers from freeze damage
- Automatic reset at 49°F for convenient, unattended operation
- Genuine York OEM replacement part for precise fit and reliable performance
- Helps prevent costly repairs and system downtime during cold weather
Applications
- York air handling units and fan coil systems
- Commercial and residential HVAC equipment requiring freeze protection
- Low-limit control circuits in mixed-air or outdoor-air applications
