Bard HVAC 8402-128BX Limit Switch

Designed for mission-critical over-temperature protection, the Bard HVAC 8402-128BX Limit Switch is a high-reliability L220F 1shot limit switch engineered for forced-air heating and air handling units. As a technical professional, you know that a "one-shot" thermal link is the final line of defense; once the 220°F threshold is reached, the circuit opens permanently to prevent catastrophic heat damage. This OEM replacement part is a direct, identical match for the discontinued 8402-128, featuring a rugged metal enclosure and a single-pole, double-throw (SPDT) internal structure for versatile integration into existing control circuits.

The 8402-128BX is factory-calibrated and tamper-proof, ensuring that safety setpoints remain precise throughout the equipment's service life. Rated for 120-240VAC and capable of handling up to 15A, this Bard replacement limit control provides the electrical robusticity required for high-demand fan and heater packages. When swapping out a failed unit, it is essential to diagnose the root cause of the over-temperature event, as this Bard HVAC safety switch is designed for single-cycle actuation and cannot be reset once triggered.

• Precise Thermal Protection: Fixed L220°F trip point ensures consistent safety shut-off for air handlers and dampers.
• Universal Compatibility: Fully interchangeable with the legacy Bard 8402-128 for seamless field replacement.
• Heavy-Duty Electrical Rating: Supports current loads up to 15A at 240VAC, suitable for commercial and residential HVAC controls.
• Durable Construction: Built with a sturdy metal housing to withstand vibration and high-ambient heat cycles within the plenum.

• Is the 8402-128BX a manual reset switch? No, this is a one-shot limit switch, meaning it must be replaced if the temperature threshold is exceeded.
• What systems use this limit control? It is commonly found in Bard wall-mount units, air conditioners, and heater packages requiring a 220-degree safety cutoff.
• Can I use a different temperature rating? No. For safety compliance, always match the L-rating (L220F) specified on the original equipment rating plate.

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.