Daikin Mini Split Error Code CE: How to Fix It

Medium 30-60 minutes Medium Severity Verified June 2026
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Error Code
CE
Brand
Daikin
Product Type
mini_split
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Error code CE on your Daikin mini split indicates a radiation thermistor fault. This sensor monitors the temperature of the indoor unit's heat exchanger or room temperature. The error typically means the thermistor is faulty, disconnected, or the wiring is damaged. This guide will help you diagnose and fix the issue.
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Tools You'll Need

How to Fix Error Code CE

  1. Turn Off Power and Safety Check

    Always turn off power before servicing to avoid electric shock or damage.

  2. Locate the Radiation Thermistor

  3. Inspect Wiring and Connections

  4. Test Thermistor Resistance

  5. Replace Faulty Thermistor

  6. Reassemble and Test

Parts You May Need

Daikin Radiation Thermistor
Check Price on Amazon
Daikin Radiation Thermistor
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Daikin Radiation Thermistor
Check Price on Amazon
Daikin Radiation Thermistor
Check Price on Amazon
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When to Call a Professional

If the error code returns after replacing the thermistor, or if you are not comfortable working with electronics and high-voltage components, contact a certified HVAC technician. Also call a pro if you suspect a main control board fault.

Frequently Asked Questions

Can I run my Daikin mini split with error CE?
It is not recommended. Error CE indicates a sensor fault that can cause incorrect temperature readings and inefficient operation. Continuous use may lead to component damage or inaccurate cooling/heating.
What is a radiation thermistor in a Daikin mini split?
A radiation thermistor is a temperature sensor that measures the temperature of the evaporator coil or indoor air. It helps the control board regulate the refrigerant flow and compressor operation.
How much does it cost to fix Daikin error CE?
If you DIY, a replacement thermistor may cost $15-$50. If you hire a technician, expect $150-$300 for service call and repair.
Where can I find the service manual for my Daikin mini split?
Service manuals are available on Daikin's official website or through authorized dealers. You can also search online using your model number.
Will turning off the power reset the error code?
A power cycle may temporarily clear the error code, but if the thermistor is faulty, the error will reappear soon after restart. The underlying issue must be fixed.

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