or audible humming indicating a breakdown in the internal transformer windings

paired with sleeve bearings for quiet

The York S1-7670-3071 Sequencer

As an OEM Bard HVAC part

Is this a direct drop-in replacement for older Rheem boards

Carrier HK06WC030 Air Flow Switch 318820-201 or audible humming indicating aThe Carrier HK06WC030 Air Flow Switch is a factory authorized pressure differential switch engineered for precise performance monitoring in commercial and residential HVAC systems. Designed with a single pole double throw (SPDT) configuration, this switch provides versatile circuit control, allowing the system to trigger proof of flow signals or lockout sequences based on static pressure changes. It operates within a sensitivity range of 0. 05 to 2. 0