McDonnell & Miller 343500 Bellows Assembly R-410A If the switch shows no

If the switch shows no continuity and the burner is cool

this assembly ensures consistent ignition and flame rectification across several flagship boiler lines

High Amperage Capacity: Rated for 21 Amps resistive and 2 HP at 240VAC to manage heavy-duty HVACR equipment

Automatic Reset Function: Re-engages the circuit at 60°F

ideal for low-pressure and high-vacuum recovery cycles

McDonnell & Miller 343500 Bellows Assembly R-410A If the switch shows noWhen you are servicing a 64 Series low water cut off, the McDonnell & Miller 343500 Bellows Assembly (Model SA64 2) is the standard issue component required to restore essential boiler safety functions. This authentic replacement bellows assembly is engineered for heavy duty steam boiler control, specifically bridging the gap between the internal float mechanism and the electrical switch. As a direct fit part for 64 Series LWCO and 764 models, it