Goodman Heat Pump Error Code 06

Error code 06 on a Goodman heat pump indicates an open start circuit, meaning the compressor's start winding has lost electrical continuity. The start winding is a separate coil inside the compressor motor that provides the initial phase shift and torque needed to get the compressor spinning from a standstill. When this winding is open (broken internally), the compressor cannot initiate rotation, and the control board detects the fault and locks out operation to prevent further damage.

A failed run capacitor is one of the most frequent triggers for this fault code, even though the code specifically references the start winding. The run capacitor provides the voltage boost and phase shift that keeps the compressor motor running efficiently. When the capacitor fails, it can cause symptoms that mimic an open start winding, including failure to start and high amperage draw. A capacitor can be tested with a capacitance meter to confirm whether it has drifted outside its rated microfarad tolerance.

Wiring faults are also a common contributor. Loose terminals, corroded connectors, or improperly connected compressor leads can create an open circuit condition between the control board and the start winding terminals. Before condemning the compressor itself, technicians should verify all wiring connections at the compressor terminal block, check for continuity through the start winding circuit, and confirm that wire gauges and connections match the unit wiring diagram. If wiring and the capacitor check out, an open start winding reading across the compressor terminals typically indicates an internally failed compressor requiring replacement.