Utica-Dunkirk 28687 Flame Sensor R-407C Why is my compressor hum-tripping

Why is my compressor hum-tripping instead of starting

For optimal torque and efficiency

the rotation is electrically reversible

or an iced-over evaporator coil when the internal needle or diaphragm fails to modulate correctly

When performing a rebuild or top-end service on a semi-hermetic compressor

Utica-Dunkirk 28687 Flame Sensor R-407C Why is my compressor hum-trippingThe Utica Dunkirk 28687 Flame Sensor is a critical safety component engineered for precise flame rectification in high efficiency residential and commercial gas fired boilers and furnaces. Designed for compatibility with various Utica and Dunkirk heating systems, this OEM replacement flame sensor monitors the burner assembly's combustion process by converting AC voltage into a measurable DC microamp signal. A veteran tech knows that a reliable