York S1-025-41330-000 Freezestat

The York S1-025-41330-000 is an OEM SPST Freezestat designed for precise low limit control in commercial and residential HVAC systems. This HVAC freeze protection switch features a fixed setpoint, engineered to open at 26°F and close at 38°F, preventing catastrophic ice buildup on evaporator coils or chilled water coils. By monitoring discharge air or refrigerant temperature, the York S1-025-41330-000 acts as a primary safety interlock, cutting power to the compressor or fan motor when localized temperatures drop below the safety threshold. The Single Pole Single Throw (SPST) configuration ensures reliable circuit interruption, making it a drop-in replacement for failed sensors in various York, Luxaire, and Coleman air handling units. For contractors, this refrigeration low limit control offers an exact fit and factory-calibrated accuracy required to maintain system integrity and prevent liquid floodback or coil ruptures caused by localized freezing conditions.

Key Benefits for Technicians:

• OEM Precision: Genuine Johnson Controls/York part ensures exact electrical matching for control boards.
• Fixed Setpoints: Factory calibrated to 26°F Open / 38°F Close for consistent coil protection without manual adjustment errors.
• Rugged SPST Logic: Simplified wiring and high-continuity switching for long-term field reliability.
• System Protection: Effectively mitigates the risk of cracked heat exchangers and damaged evaporator fins.

Common Technical Questions:

How do I test the York S1-025-41330-000 in the field?
Using a multimeter set to continuity, check across the terminals at room temperature; the switch should be closed. To verify the open setpoint, use a cold spray or ice bath targeted at the sensor bulb to drop the temperature below 26°F, at which point the circuit should break.

Can this freezestat be used in chilled water applications?
Yes, this component is frequently used as a low-temperature cutout on chilled water coils to prevent the water from freezing and bursting the copper tubes during low-load or high-airflow conditions.

Does this switch require a manual reset?
No, this specific model features an automatic reset logic, re-closing the circuit once the sensed temperature rises to the 38°F threshold.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.