Goodman mini-split shows E7 and unit stops shortly after starting

Safety first: Turn off power to the system at the breaker and disconnect. Do not attempt to open refrigerant lines.

Steps to check:

• 1. Confirm thermostat/mode settings: On multi-zone Goodman systems, ensure all indoor units are set to the same mode (all cool or all heat). Mixed modes can trigger E7.
• 2. Power cycle: Turn off power for 5 minutes, then restore and reselect the desired mode on all zones.
• 3. Listen for reversing valve operation: When switching between heat and cool, you should hear a distinct click from the outdoor unit. No sound may indicate a failed coil or control.
• 4. Inspect wiring to reversing valve coil: With power off, check that the two wires to the reversing valve coil are secure and not damaged.

When to call a professional: Diagnosing a stuck reversing valve or control board fault requires gauges and electrical testing. Replacement of the valve involves refrigerant recovery and brazing and must be done by a licensed HVAC technician.