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This blocked vent limit switch is a manual reset safety device that monitors exhaust temperatures
Built with a 48Y NEMA frame size
preventing common lockout scenarios in forced air systems
The McDonnell & Miller 305200 Replacement Switch (Model number FS4-33) is a high-performance SPDT (Single Pole
Reznor 147830 Gas Valve Refrigerant This blocked vent limit switchThe Reznor 147830 Gas Valve is a direct replacement single stage gas valve designed for reliable fuel regulation in Reznor unit heaters. Engineered for natural gas HVAC systems, this redundant solenoid valve operates on a 24V gas valve control circuit, ensuring precise opening and closing sequences during the ignition cycle. With a standard 1 2 inch NPT inlet and outlet, it integrates seamlessly into existing manifolds, maintaining a factory set 3. 5"
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