The Utica-Dunkirk 26878 Flame Sensor is a critical safety component engineered for precision monitoring in high-efficiency residential and commercial boilers. As an OEM replacement flame sensor, this part is designed to detect the presence of burner ignition via flame rectification, sending a microamp signal to the integrated control board to maintain gas valve operation. A failing or fouled 26878 boiler part is the primary cause of units that cycle on for several seconds before locking out on a safety fault. This sensor features a high-temperature alloy rod and a durable alumina ceramic insulator to withstand the intense thermal stresses of the burner assembly. Installing this Utica gas boiler flame sensor ensures your heating system safety protocols remain intact, preventing unburned gas accumulation. For the best performance in the field, technicians should verify the furnace flame sensor replacement matches the specified Dunkirk boiler part number to ensure proper mounting geometry and signal continuity within the combustion chamber. Direct OEM Compatibility: Specifically designed as a drop-in replacement for Utica-Dunkirk 26878 models, ensuring no field modifications are required. Optimized Signal Strength: Engineered to provide a consistent microamp reading to the ignition control module, reducing nuisance lockouts. High-Temperature Durability: Constructed with robust materials to resist carbon buildup and oxidation in high-cycle environments. Safety Integrity: Vital for flame detection, accurately shutting down the gas valve if the flame is not sensed during the ignition trial. Common Questions How do I know if the Utica-Dunkirk 26878 is faulty? If the burner ignites but shuts off within 2 to 5 seconds, the sensor is likely failing to send the rectification signal. Check for cracks in the porcelain or heavy oxidation on the metal rod. Can this sensor be cleaned during annual maintenance? Yes, technicians can often restore signal strength by gently cleaning the rod with a fine-grit emery cloth or steel wool to remove carbon deposits, though a full replacement is recommended if the ceramic is compromised. Will this part work in other gas-fired appliances? This part is specifically engineered for designated Utica and Dunkirk boiler series. Always verify the part number against the manufacturer’s technical data sheet to ensure HVAC part compatibility. This item is not eligible for free shipping. 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.
