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Whether you are servicing a Series 21 make-up air unit or a Series 20 space heating system
making it a reliable choice for ceiling plenum installations where environmental stability is critical
Key Benefits for Technicians Direct Compatibility: Specifically designed for the Fenwal 05-12 series ignition modules
upgrading to this factory-spec Lennox 83L71 restores the microamp signal accuracy necessary for safe burner operation
Superior Material Durability: The cast bronze construction and stainless steel mesh resist de-alloying and erosion in steam and water service
Williams P200400 Selector Switch Whether you are servicing aThe Williams P200400 F145 30F Selector Switch is a critical temperature actuated control engineered specifically for Williams Forsaire Direct Vent Wall Furnaces and high performance HVAC systems. This OEM Williams P200400 component functions as a dual point thermal safety and operational interface, maintaining precise system thresholds at 145F and 30F. Built with a robust toggle mechanism, it serves as a protective switch to safeguard heat exchangers
US$ 155.00
US$ 49.95
US$ 162.50
US$ 65.00