While the blue glow may remain visible beyond 12 months

the PM43440 ensures the safety and longevity of 24VAC thermostats and control boards

effectively preventing heat exchanger damage

This multi-stage functionality ensures optimal thermal regulation and system efficiency

a specific conversion kit must be installed by a qualified technician to change the regulator spring and orifice settings

Lennox 10J58 Ignition Control 30067439-890 While the blue glow mayThe Lennox 10J58 Ignition Control (also identified as 10J5801) is a critical direct spark ignition (DSI) board designed for precise burner sequencing in high efficiency Lennox furnace and air handler units. This microprocessor based ignition module monitors flame sensing and manages the gas valve timing to ensure safe combustion cycles. Technicians regularly utilize this part as a direct replacement for Johnson Controls G776RGD 11 and G776RGD 1,