Burnham Boiler 6016066 Limit Switch

The Burnham Boiler 6016066 Limit Switch is a critical genuine OEM replacement part designed for high-limit temperature protection in hydronic heating systems. This 200°F manual reset limit switch acts as a fail-safe, interrupting the burner circuit if the boiler water temperature exceeds the safe preset threshold. Unlike automatic reset controls, this 1/2" NPT-mounted component requires manual intervention once tripped, ensuring that a technician can diagnose the cause of the over-temperature condition before restarting the system. Engineered specifically for Burnham residential boilers, this high limit safety control maintains the structural integrity of the heat exchanger by preventing localized boiling and excessive thermal stress.

Key Benefits for the Contractor:

• OEM Precision: Guaranteed compatibility with Burnham boiler models, eliminating the field-fitting issues common with universal 110T series or generic roll-out switches.
• Enhanced System Safety: The manual reset design forces a system inspection after a high-limit event, preventing repeated cycling under unsafe conditions.
• Durable Thermal Disc: Constructed with heat-resistant materials calibrated for a precise 200°F trip point to ensure long-term reliability in high-temperature environments.
• Direct Fit Installation: Standard configuration allows for rapid swap-outs during emergency service calls, reducing labor time and verifying boiler safety control compliance.
• Protect Critical Components: Prevents damage to circulator pumps and zones by cutting off the heat source before water reaches dangerous temperatures.

Common Questions & Technical Insights:

How do I know if the Burnham 6016066 needs to be replaced?
If the burner stays off while the system is cold and you have continuity issues across the switch terminals after a manual reset attempt, the internal bimetal disc or contacts have likely failed. Always check for scale buildup on the sensing bulb, as this can cause inaccurate temperature readings.

Can this limit switch be used in place of an automatic reset control?
No. In most jurisdictions, a manual reset limit switch is a required secondary safety. Replacing it with an automatic reset model can lead to unsafe "hunting" or rapid cycling, potentially causing catastrophic boiler failure.

What causes a 200°F limit switch to trip frequently?
Frequent tripping usually indicates poor circulation, a malfunctioning primary aquastat, or air trapped in the heat exchanger. Verify that the circulator is moving water at the correct GPM before assuming the switch is faulty.

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.