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Error code reference

Mitsubishi Air Conditioner Error Code E.RET

Retry count excess

Mitsubishi codesMitsubishi air conditioner codes
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What the E.RET error code actually means

Your Mitsubishi air conditioner tried to restart itself after a problem occurred, but it failed too many times in a row and gave up. This error is a signal that something more serious is wrong with the system and it needs a technician to find and fix the original problem before it will run again. Simply resetting the unit without fixing the underlying issue will likely cause the same error to come back.

Diagnostic procedure

The full E.RET procedure

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First diagnostic step
Find the cause of the fault occurrence and eliminate the cause of the preceding error.
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Most common causes of E.RET

Ranked by how often they cause this code
  1. 1Unresolved preceding fault condition
  2. 2Refrigerant pressure abnormality
  3. 3Inverter or drive board fault
  4. 4Communication error between indoor and outdoor units
  5. 5Motor or compressor protection trip

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Questions people ask about E.RET

What does E.RET mean on a Mitsubishi air_conditioner?
E.RET means the system exceeded the retry count set in parameter Pr.67 while attempting to resume operation after a fault. The unit tried to restart automatically a set number of times and failed each time. This lockout requires a technician to identify and resolve the original fault before the system will operate again.
Is it safe to keep running my air conditioner when E.RET is displayed?
No, the unit will not operate while E.RET is active since the system has locked itself out. Attempting to force operation without addressing the underlying fault could cause further damage. The unit should remain off until the root cause is diagnosed and corrected.
How much does it cost to repair an E.RET error on a Mitsubishi air conditioner?
Repair costs vary widely depending on the root cause fault. A simple wiring fix or refrigerant recharge might cost between $150 and $400, while component replacements such as an inverter board or compressor can range from $400 to $1,500 or more. A diagnostic service call is typically needed first to identify the specific underlying fault.
Can I fix E.RET myself without a technician?
In most cases, no. E.RET is a secondary error that points to a recurring underlying fault, and identifying that fault typically requires access to the unit's fault history and diagnostic tools. Homeowners can check for obvious issues like blocked airflow or tripped breakers, but resolving the root cause usually requires a qualified HVAC technician.
Will resetting the unit clear the E.RET error?
A reset may temporarily clear the error, but if the underlying fault condition still exists, the unit will begin its retry cycle again and eventually return to the E.RET lockout. The error will continue to reappear until the original fault is diagnosed and repaired.

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