Common failure points include internal coil burnout or pitted contacts

and heat pump reversing valve logic in York

As a veteran-grade pilot-operated regulator component

Designed for seamless integration into older heater models and direct-fired systems

the 920915A is the direct OEM replacement for the 624742

Bard 8402-049 Limit Switch 322027-701 Common failure points include internalThe Bard 8402 049 Limit Switch is a critical OEM safety component designed for high performance temperature regulation in Bard wall mount HVAC units. This L150 35 limit control is engineered as a primary line break safety, featuring a 150F fixed setpoint and a 35F differential. When internal plenum temperatures exceed the 150F threshold, the switch opens the electrical circuit to prevent heat exchanger damage and system overheating. This specific HVAC