National Comfort Products 14265025 Door Switch R-448A and a Series-4 specific O-ring

and a Series-4 specific O-ring for a leak-free seal

Ensures reliable operation of Bard wall-mounted HVAC control panels

preventing common multi-speed motor failures and maintaining air handler efficiency

60" WC pressure to the barb and check for continuity across the terminals

specifically across several TSC036

National Comfort Products 14265025 Door Switch R-448A and a Series-4 specific O-ringThe National Comfort Products 14265025 Door Switch is a critical safety and operational component designed specifically for thru the wall condensing units and heating systems. As a veteran grade HVAC replacement part, this switch provides precise door position sensing, functioning as a high reliability interlock that prevents system operation when the access panel is removed. This OEM door switch ensures that high voltage blower components and burners