E3 error and outdoor unit shuts down during cooling or heating

Safety: Disconnect power at the outdoor disconnect before working on the condenser.

• Clean condenser coil: Remove top grille if needed. Use a garden hose (low pressure) to rinse debris from the coil fins from inside out. Avoid bending fins. Do not use a pressure washer.
• Clear obstructions: Ensure at least 24–36 inches of clearance around the Fraser‑Johnston outdoor unit. Remove leaves, grass, or objects blocking airflow.
• Check outdoor fan: Restore power and observe the fan. If the compressor runs but the fan does not, shut power off immediately. Inspect the fan motor and capacitor. A swollen or leaking capacitor should be replaced with the same µF rating and voltage.
• Inspect coil for damage: Severely bent fins or blocked sections can cause high head pressure. Straighten fins with a fin comb if needed.
• Persistent E3: If the coil is clean and fan is operating but E3 continues, the system may be overcharged or have a restriction. This requires gauges and EPA-certified service.