Fault codes / EasyStart / 4 blinks

EasyStart: 4 blinks

What it means: Compressor overload open.

What to check

The compressor is hot. Check condenser airflow and the fan. If airflow is fine the compressor is on its way out.

Learn the system

• Rooftop AC
• Capacitors
• Airflow and coils
• Thermostats and AC control boards

Practice it on a service call

• AC hums and trips
• AC runs but barely cools
• AC ices up and barely blows

Guided diagnosis

• Air Conditioner
• Thermostat

Other EasyStart codes

• EasyStart: 1 blink Unexpected current, learning problem
• EasyStart: 2 blinks Over current: run current above the limit or above what it learned
• EasyStart: 3 blinks Power interruption or short cycle timer
• EasyStart: 5 blinks Stall: compressor will not come up to speed
• EasyStart: 6 blinks Wrong line voltage for the model
• EasyStart: 7 blinks No signal from the start winding

Full field guide: Micro-Air EasyStart soft start

Codes come from the maker manuals and public service sheets. Your model's own chart always wins, and LP and 120 volt work belongs to a qualified technician.