Component Protection: Properly sized Allen head prevents over-torquing and stripping of sensitive pneumatic thermostat components

and thermal overloads that can lead to catastrophic compressor or blower failure

these service valves are non-rebuildable

this is a fan control switch designed to manage blower operation

Copeland 943-0152-00 Controller 320819-301 Component Protection: Properly sized Allen115v Non Fan Cycle Controller 943 0152 00 is the direct replacement for 543 0132 00, 543 0132 01 Copeland 943 0152 00 Controller 115V Electronic Unit Controller (Non Fan Cycle) OEM Diagnostic Module The Copeland 943 0152 00 Controller is a reliable electronic unit controller designed for efficient compressor diagnostics and operation management. Operating at 115V, this non fan cycle controller is ideal for HVAC systems that require precise control and