Weil-mclain wm383500600 Flue Temperature Sensor Replacement Kit for Ultra Gas and Commercial Boilers

Product Description

The Weil-McLain wm383500600 Flue Temperature Sensor Replacement Kit is a factory-specified service part designed for use with Weil-McLain Ultra Gas Boilers, Ultra Commercial Boilers, Ultra 550, and Ultra 750 series 3 models. This kit includes the flue temperature sensor and grommet, giving technicians everything needed to complete a full sensor replacement in a single service call. The flue temperature sensor plays a critical role in the safe and efficient operation of a condensing gas boiler. It monitors the temperature of exhaust gases leaving the heat exchanger and feeds that data to the boiler control board. If flue temperatures rise above safe thresholds, the control board can trigger a fault or lockout to protect the unit from damage. A failed or out-of-calibration sensor can cause nuisance lockouts, erratic boiler behavior, or failure to fire. Replacing it with the correct OEM part restores accurate flue temperature monitoring and reliable system performance. HVAC technicians and boiler service pros working on Weil-McLain Ultra series equipment will recognize this kit as a direct drop-in replacement that eliminates guesswork. The included grommet ensures a proper seal at the sensor mounting point, preventing flue gas leakage and maintaining combustion integrity. Using the manufacturer-matched part number wm383500600 also simplifies parts sourcing, warranty documentation, and service recordkeeping. This sensor replacement kit is well-suited for planned preventive maintenance, warranty service, and emergency repair calls on commercial and residential hydronic heating systems. Keeping this part stocked reduces downtime on Weil-McLain Ultra boiler service calls.

• Includes flue temperature sensor and grommet for a complete replacement
• Compatible with Weil-McLain Ultra Gas Boilers, Ultra Commercial Boilers, Ultra 550, and Ultra 750 series 3 models
• OEM-matched part for accurate flue temperature monitoring and reliable boiler control

Product Highlights

The Weil-McLain wm383500600 Flue Temperature Sensor Replacement Kit delivers a complete, OEM-matched solution for restoring accurate flue monitoring on Ultra series 3 boilers. The kit includes both the sensor and grommet to support a thorough, single-visit repair.

Product Information

Standard Information

• Brand: WEIL-MCLAIN
• Manufacturer Part Number: wm383500600

Technical Specifications

• Compatible Equipment: Ultra Gas Boilers, Ultra Commercial Boilers, Ultra 550, Ultra 750
• Compatible Series: Series 3
• Kit Contents: Flue temperature sensor, grommet
• Part Type: Replacement sensor kit