Coleman air conditioner displays E8 and may shut down due to over-temperature or over-current conditions.

Safety: Turn OFF all power to the system. Overheating components can cause burns; allow time to cool.

• Inspect outdoor unit: Remove debris from around the Coleman condenser. Clean the coil thoroughly with coil cleaner and water as described in other steps.
• Verify fan operation: After cleaning, restore power and run the unit. Confirm the condenser fan starts immediately and runs continuously while the compressor is on. Replace the fan motor or capacitor if it fails to start or stops intermittently.
• Check indoor airflow: Replace the air filter and ensure all supply and return vents are open. Inspect the indoor coil for dirt and clean if necessary.
• Electrical checks: With power OFF, inspect wiring for discoloration or melted insulation at the contactor, compressor terminals, and fan motor. Loose connections can cause overheating; tighten as needed.
• Voltage verification (technician-level): Measure line voltage at the condenser while running. Low voltage under load can cause high current draw and E8 faults. An electrician may be needed to correct supply issues.
• Monitor operation: After corrections, clear the code by cycling power and observe a full cooling cycle to ensure E8 does not return.

Warning: Persistent E8 after cleaning and fan repair may indicate internal compressor damage; contact a professional.