Utica-Dunkirk AQ02101 Rollout Switch

The Utica-Dunkirk AQ02101 Rollout Switch is a mission-critical safety component engineered for precise thermal monitoring in cast-iron gas boilers and furnace burner assemblies. This 290F manual reset switch serves as a high-limit failsafe, designed to break the electrical circuit and shut down the gas valve if flue gases or flames "roll out" of the combustion chamber. When a furnace rollout switch trips, it typically indicates a significant pressure imbalance, such as a cracked heat exchanger, blocked venting, or a failing inducer motor. Because this is a manual reset safety switch, it prevents the system from automatically restarting, forcing a necessary inspection to identify the underlying cause of the thermal event.

Built for the rigors of commercial and residential HVACR environments, the AQ02101 provides a reliable 290-degree Fahrenheit trip point. It is a genuine OEM replacement part for various Utica and Dunkirk boiler models, ensuring exact fitment and calibration for the safety string. As a professional, you know that bypassing or using a non-rated switch compromises the entire equipment safety protocol. This limit thermostat disc is the industry standard for maintaining HVAC system safety and preventing catastrophic overheating or backdrafting conditions.

• Precise Safety Calibration: Fixed 290F trip point ensures the system shuts down immediately upon detecting abnormal vestibule temperatures.
• Manual Reset Security: Prevents unsafe auto-cycling, ensuring a technician must diagnose the root cause—such as a blocked vent or burner issue—before operation resumes.
• OEM Compatibility: Designed specifically for Utica-Dunkirk boilers, maintaining the original engineering specifications and safety ratings of the appliance.
• Durable Construction: High-quality thermal sensor element designed to withstand the high-ambient conditions of a boiler cabinet without nuisance tripping.

• Why does the AQ02101 rollout switch keep tripping? Frequent tripping is rarely the fault of the switch. Check for a clogged secondary heat exchanger, soot buildup in the flue, or improper gas pressure at the manifold (standard 3.5" W.C. for Nat Gas).
• Can I replace a different temperature-rated switch with this 290F model? No. Safety limits must match the manufacturer’s specified temperature. Installing a higher-rated switch can lead to heat damage or fire hazards.
• How do I test the switch for continuity? Using a multimeter, check for 0 ohms across the terminals when the reset button is depressed. If you show an open circuit (OL) after a reset, the internal bimetal disc or contact points have failed.

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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.