Loud buzzing often indicates loose core laminations or an overcurrent condition on the 230V secondary side

This is specifically a high-pressure switch designed with a 650 PSI trip point

OEM Compatibility: Specifically designed as a drop-in ICP 1178026 replacement motor for seamless integration

provided capacitance limits are maintained

Versatile Mounting: The 56 frame configuration provides a standard footprint for quick installation in variety of housing brackets

Trane CTR1978 Contactor 320788-702 Loud buzzing often indicates looseThe Trane CTR1978 Contactor is a heavy duty 3 pole magnetic contactor designed for reliable load switching in commercial and residential HVACR systems. Engineered with a 24V coil, this high performance component manages power distribution to compressors and condenser fan motors, ensuring stable electrical contact under high cycle conditions. It serves as a direct replacement for many OEM Trane heating and cooling parts, maintaining the electrical