Mitsubishi Heat Pump Error 6600: LEV Motor Fault
If your Mitsubishi heat pump displays error 6600, it indicates that the electronic expansion valve motor has an error. This is a diagnostic code stored by the control board when the system detects an abnormal condition. BC Wide Home Services Ltd, doing business as BC Wide Heating & Air Conditioning technicians are thoroughly trained on Mitsubishi error codes and can quickly diagnose the root cause and restore your system to proper operation.
Preventing Mitsubishi Error 6600 in the Future
Regular maintenance is the best way to prevent error 6600 and other fault codes on your Mitsubishi system. Annual professional maintenance includes cleaning the flame sensor, inspecting wiring connections, checking gas pressure, verifying proper airflow, and testing all safety controls. BC Wide Home Services Ltd, doing business as BC Wide Heating & Air Conditioning offers comprehensive maintenance programs for Mitsubishi equipment. Well-maintained systems have fewer error codes and emergency service calls.
What Error 6600 Means on Your Mitsubishi Heat Pump
Error 6600 on Mitsubishi heat pump systems indicates the electronic expansion valve motor has an error. This diagnostic code is generated by the system's control board when sensor readings or operating conditions fall outside the expected range. Mitsubishi equipment uses sophisticated diagnostics to help technicians pinpoint problems accurately. The error code is stored in the control board's memory and can be retrieved even after the system has been reset.
Common Causes of Mitsubishi Error 6600
Error 6600 on Mitsubishi equipment can be caused by several factors. The most common causes include: LEV coil open circuit, connector issue, control board fault, valve stuck. BC Wide Home Services Ltd, doing business as BC Wide Heating & Air Conditioning technicians systematically test each potential cause to identify the root issue efficiently. The specific cause in your situation will depend on your system's model, installation configuration, and operating history.
How to Respond to Mitsubishi Error 6600
When you see error 6600 on your Mitsubishi system, start with these steps: Check that the power supply is on and stable. Verify the gas supply valve is open if applicable. The expansion valve controls refrigerant flow. Professional diagnosis is required. If the error persists or returns after resetting the system, professional diagnosis is recommended. Do not repeatedly reset the system without addressing the underlying cause, as this can lead to component damage or safety hazards.
Diagnosing Mitsubishi Error 6600
Professional diagnosis of error 6600 involves several steps. Our technicians begin by retrieving the stored fault code from the control board's memory, then systematically test each potential cause. This includes measuring electrical values with multimeters, checking sensor resistance readings, verifying gas pressure, inspecting wiring harnesses for damage, and testing components individually. BC Wide Home Services Ltd, doing business as BC Wide Heating & Air Conditioning uses manufacturer-recommended diagnostic procedures for all Mitsubishi error codes.
Safety Reminder
If you smell gas, suspect carbon monoxide or believe there is an immediate danger, leave the property and contact emergency services or the appropriate gas emergency authority. Do not remain inside — exit the building immediately and call for help from outside.