The Bradford White 415-43676-02 Limit Switch is a critical safety component engineered for high-temperature monitoring in residential and commercial atmospheric water heaters

including both round and square shaft models within the MCP-3631 family

Robust Construction: UL-listed design with a 650 PSI rating ensures reliability in high-capacity systems from 3/4 to 5 tons

Using an incorrect pitch can overload the fan motor or fail to pull enough air to cool the refrigerant

Lennox 12J99 Ignition Control Els PW 17895 The Bradford White 415-43676-02 LimitThe Lennox 12J99 Ignition Control (Part Number 104278 01) is a critical OEM furnace control board designed for precise sequencing of the ignition process in 24 VAC residential heating systems. As a direct cross replacement for legacy components including Lennox 60M32, 12J9901, and the original 104278 01, this module manages the gas valve, ignitor, and flame sensing circuits to ensure safe combustion cycles. This electronic integrated ignition control