York 025-41573-000 Flow Sensor

The York 025-41573-000 Flow Sensor is a high-precision OEM thermal flow switch engineered for York centrifugal chillers and scroll chillers, including YLAA, YVAA, and YVFA models. Operating on a 24 VAC circuit, this sensor utilizes advanced non-contact measurement technology to monitor liquid or air velocity within the system. By detecting the temperature differential between dual thermistors at the probe tip, it provides real-time feedback to the chiller’s control board, ensuring the system only operates when sufficient flow is present to prevent evaporator freeze-up or compressor damage.

For service technicians, the 025-41573-000 is a direct replacement designed for horizontal pipe installation at the 3 o’clock or 9 o’clock position to ensure the tip remains fully immersed. The 025-41573-000 Flow Sensor features durable construction for industrial HVAC environments and typically integrates via Male NPT threads for a leak-proof fit. Replacing a faulty sensor restores accurate HVAC flow monitoring, eliminates nuisance low-flow alarms, and maintains high-efficiency performance in critical cooling applications.

Key Benefits

• Direct OEM Compatibility: Engineered specifically for York/Johnson Controls equipment, including YCAV, YCIV, and YVWA systems.
• Thermal Sensing Technology: Provides reliable flow detection without moving parts, reducing mechanical wear and internal contamination.
• Safety Interlock Integration: Critical for protecting heat exchangers by validating flow before allowing high-load operation.
• Rugged Industrial Design: Built to withstand vibrations and extreme temperature cycles common in commercial mechanical rooms.
• Standardized Electrical Interface: Operates on a standard 24 VAC power supply, simplifying field wiring and diagnostics.

Common Questions

How can I tell if my York flow sensor is failing?
Technicians often observe constant gurgling noises, "Low Flow" fault codes on the control panel despite pump operation, or visible leaks and corrosion around the sensor probe. You can verify the sensor by checking for a proportional signal voltage at the control input.

What is the correct mounting orientation for the 025-41573-000?
To ensure the probe is consistently immersed at least 12mm in the fluid, it must be mounted on the side of a horizontal pipe (3 o’clock or 9 o’clock position). Mounting it on top can lead to false readings due to air pockets.

Does this sensor require a 120V or 24V power supply?
This specific model is a 24 VAC sensor designed for centrifugal and scroll chillers. Screw chillers often require a 120V version (such as the 393-12344-000 kit), so always verify your unit's control voltage before installation.

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.