Utica-Dunkirk 550003159 Sensor Kit

The Utica-Dunkirk 550003159 DHW Temperature Sensor Kit is a critical OEM replacement part engineered specifically for technical integration with Utica MAC-150 condensing boiler systems. Utilizing high-precision NTC temperature sensor technology (Negative Temperature Coefficient), this kit provides the control board with real-time resistance feedback to regulate domestic hot water modulation. Accurate thermal monitoring is essential for maintaining setpoint stability and preventing short-cycling in high-efficiency DHW heating systems. As a genuine Utica Dunkirk part, this kit ensures electrical compatibility and thermistor curve accuracy that aftermarket alternatives often fail to match. Field technicians should note that the sensor is designed for direct immersion or well-mounting to monitor boiler domestic hot water temperature accurately. Please verify existing piping configurations before installation; note that while this is a comprehensive boiler sensor replacement, the mounting gasket must be sourced separately to ensure a pressure-tight seal during the swap.

Key Benefits:

• System Precision: High-accuracy NTC thermistor ensures the boiler modulates correctly based on actual water temperature.
• OEM Compatibility: Specifically calibrated for the Utica MAC-150 control logic to prevent sensor drift errors.
• Performance Optimization: Enhances fuel efficiency by providing stable DHW temperature regulation.
• Rugged Construction: Designed to withstand the thermal cycling typical of modern high-efficiency hydronic applications.

Common Questions:

Is the gasket included in the 550003159 kit?
No, the DHW sensor gasket is not included and must be purchased separately to ensure a proper seal during installation.

What are the symptoms of a failing Utica DHW sensor?
Common indicators include fluctuating domestic hot water temperatures, "no demand" errors on the MAC-150 display, or the boiler failing to switch from central heating to DHW mode.

Can I test this sensor with a multimeter?
Yes, technicians can verify the 550003159 sensor by measuring the resistance (Ohms) across the terminals and comparing it to the manufacturer’s NTC resistance chart at specific temperatures.

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.