Warning: Disconnect power before servicing.
ErrBase

Daikin Mini-Split E0 Error Code: Safety Device Activated

Quick Answer

Daikin E0 is a general safety device activation code - it appears when any of the system's safety switches trip without a more specific code being generated. The most common safety devices that trigger E0 are the high-pressure switch on the outdoor unit, the compressor internal thermal overload, and the inverter board overheat sensor.

Daikin E0 is a general safety device activation code - it appears when any of the system's safety switches trip without a more specific code being generated. The most common safety devices that trigger E0 are the high-pressure switch on the outdoor unit, the compressor internal thermal overload, and the inverter board overheat sensor. To determine which safety device triggered E0, enter diagnostic mode and check the error sub-code. On Daikin units with the field setting function, the sub-code narrows down the specific safety device. Without the sub-code, start by checking the most common triggers: restricted outdoor airflow, dirty coils, and refrigerant charge.

DaikinMinisplitSeverity: highDifficulty: intermediate75% DIY Success
Time to Fix
30–180 min
Difficulty
intermediate
Parts Cost
$10 – $60
Tools Needed
Multimeter, Garden hose

What Does the E0 Code Mean?

E0 is a general safety protection code. Enter diagnostic mode to check the sub-code to identify which specific safety device triggered.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

High pressure switch tripped from dirty outdoor coil40%
Compressor internal thermal overload24%
Inverter board overheat protection14%
Outdoor unit in direct afternoon sun with restricted airflow12%
Low pressure switch activation10%

Symptoms You May Notice

  • E0 on indoor display
  • System shuts down completely
  • May have been running fine then suddenly stopped
  • Outdoor unit may be very hot
  • Possible clicking from safety switch resetting

Can you reset a Daikin minisplit to clear the E0 code?

Turn breaker off for 60 seconds to allow all safety devices to reset. Some thermal overloads require 30+ minutes of cooling before they reset automatically. Press Cancel on remote for 5 seconds after restore.

Tools Required for Diagnosis

MultimeterGarden hoseCoil cleanerManifold gauges (HVAC tech)

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

1

Enter diagnostic mode by holding MODE + FAN on the remote for 5

Enter diagnostic mode by holding MODE + FAN on the remote for 5 seconds. Read the error history and sub-code. The sub-code identifies which safety device triggered: HP = high pressure, LP = low pressure, OL = overload, OH = overheat.

2

Clean the outdoor condenser coil and ensure 12 inches of

3

If E0 persists after cleaning

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name
Daikin High Pressure SwitchModel-specific · $25–$60
Coil cleanerN/A · $10–$20

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs
Labor Approach
Our Verdict
REPAIR
Estimated Cost: $35 (Parts) vs $5500 (New Machine)

Frequently Asked Questions

Is E0 dangerous?
E0 means a safety device is working correctly to protect the system. It is not dangerous because the safety shutdown prevents damage. However, the underlying cause should be diagnosed and fixed to prevent repeated safety trips which stress the system.
Why does my Daikin show E0 instead of a specific code?
E0 is a catch-all safety code used when the triggered safety device does not have its own dedicated error code. Entering diagnostic mode and reading the sub-code provides more specific information about which safety device activated.
E0 keeps coming back after I reset. What should I do?
Repeatedly resetting without fixing the cause is counterproductive. The safety device is triggering for a reason. Clean the outdoor coil first (fixes 40% of E0 cases), then call an HVAC technician if it persists. Ignoring E0 can lead to compressor damage.

Related Daikin Minisplit Error Codes

Code: HUBDaikin Mini-Split Error Codes: Complete GuideCode: E3Daikin Mini-Split E3: High Pressure ProtectionCode: E4Daikin Mini-Split E4: Low Pressure ProtectionCode: E5Daikin Mini-Split E5: Compressor Overload

Models Known to Experience E0 Errors

This repair applies to most Daikin minisplits with this error code. Common model numbers include:

FTXS09LVJU, FTXS12LVJU, FTXM15QVJU, FTXM18QVJU, FTXM24QVJU, RXS09LVJU

Last verified for technical accuracy on March 15, 2026