Digital display shows E6; unit may not start compressor

Safety First: Disconnect power before touching any electrical components. Compressor circuits carry high current.

• Listen for compressor behavior: When powered, does the compressor hum then click off? This suggests a start component or overload issue.
• Inspect wiring: With power off, check all compressor terminals and wiring for tightness and signs of overheating.
• Test start components: On models with external start capacitor/relay, test the capacitor with a capacitance meter and replace if out of tolerance. Replace a burnt or rattling relay.
• Check condenser and fan: Ensure the condenser is clean and the fan is operating to prevent high head pressure.
• Reset overload: Allow the compressor to cool for at least 30 minutes, then reset power and observe.

When to call a technician: If E6 persists, the compressor may be mechanically locked or drawing excessive current and requires professional evaluation.