Daikin Mini Split Error Code EC: How to Fix It

Medium 30-60 minutes Medium Severity Verified June 2026
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Error Code
EC
Brand
Daikin
Product Type
mini_split
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Daikin error code EC indicates that the discharge pipe thermistor is reading a temperature that is too high, often due to a faulty thermistor, refrigerant issues, or airflow problems. This guide provides step-by-step troubleshooting steps to resolve the error.
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Tools You'll Need

How to Fix Error Code EC

  1. Turn Off Power and Inspect the Unit

    Always disconnect power before servicing the unit. High voltage components can cause injury.

  2. Check Thermistor Resistance

  3. Compare Readings and Replace if Faulty

  4. Clean Air Filters and Outdoor Coil

    Do not use pressure washers as they can damage coil fins.

  5. Check Refrigerant Charge

    Only EPA-certified technicians should handle refrigerant.

Parts You May Need

Discharge Pipe Thermistor
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Discharge Pipe Thermistor
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Discharge Pipe Thermistor
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Discharge Pipe Thermistor
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When to Call a Professional

If the thermistor is within specs but the error persists, or if you suspect refrigerant issues (leaks or overcharge), call a licensed HVAC technician. Also seek professional help if you are uncomfortable working with electrical components.

Frequently Asked Questions

Can I reset Daikin error code EC without fixing the issue?
Yes, you can reset the error by turning off the system at the breaker for 5 minutes, then turning it back on. However, if the underlying problem isn't fixed, the code will return.
How much does it cost to replace a Daikin discharge pipe thermistor?
The thermistor part costs around $20-$40. DIY replacement saves labor costs, but if you hire a technician, expect $150-$250 total.
Will dirty filters cause error EC?
Yes, dirty filters reduce airflow, causing the system to overheat and potentially trigger error EC.
What is the normal resistance for a Daikin discharge pipe thermistor?
At room temperature (77°F/25°C), a 10k ohm thermistor should read approximately 10k ohms. Check your manual for exact values.
Can I drive my Daikin mini split with error EC?
It is not recommended to run the system with error EC as it can cause further damage to the compressor. Turn off the unit and troubleshoot.

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