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replacing this part is the standard procedure to restore close-off performance
The McDonnell & Miller 304400 is a genuine replacement flow switch cover (Model FS4-3COV) engineered specifically for Xylem FS4-3 liquid flow switches and the AF-1
a specific LP conversion kit must be utilized to prevent over-firing
This component generates a consistent 20-28 mV open circuit range
BASO K16BA-36 Thermocouple replacing this part is theThe BASO K16BA 36 Thermocouple is a professional grade flame sensing component engineered for high performance standing pilot ignition systems. As a veteran preferred 36 inch thermocouple, this unit generates a reliable 2535 mV open circuit millivolt range, ensuring the gas valve remains energized only when a stable pilot flame is present. Designed as the direct BASO K16BA 36 replacement for legacy K16BA 36C and K16BA 36H models, it provides the