facilitating a seamless drop-in replacement that maintains the original equipment’s performance standards

this switch is mounted on the side of the burner box or near the manifold to monitor for escaping flames or excessive radiant heat

shielding terminal blocks and wiring from dust

Color-Coded Installation: Blue lead wiring allows for quick identification during complex wiring harness repairs

as well as various gas-fired units

McDonnell & Miller 305200 Replacement Switch Els PW 17895 facilitating a seamless drop-in replacementThe McDonnell & Miller 305200 Replacement Switch (Model number FS4 33) is a high performance SPDT (Single Pole, Double Throw) snap action assembly specifically engineered for integration with general purpose liquid flow switches. This technician grade component serves as the core electrical interface for Series FS4 3 and FS4 3T units, detecting flow velocity changes to trigger or terminate power to downstream equipment such as pumps, burners, and