C4

Malfunction of Heat Exchanger Temperature Sensor

Description

The heat exchanger temperature sensor is malfunctioning.

Appliance Error Codes Details

Error Code
C4
Error Name
Malfunction of Heat Exchanger Temperature Sensor
Appliance Type
air_conditioner
Brand
Daikin
Severity
medium

Additional Troubleshooting

1. Reset the system
2. Contact service for sensor replacement

Was this helpful?

Loading...

Send Feedback

Found an error or have a suggestion? We respond within 48 hours.

About this page

Author: Pavel Volkov
Created:

Learn More

Dive deeper with our comprehensive developer guides for Appliance Error Codes

Appliance Error Codes: Troubleshooting Guide

Fix your home appliances with our comprehensive troubleshooting guide. Learn to identify error codes...

Pavel Volkov Aug 30, 2025
View all guides

Related Codes

More codes of the same type

A5

Malfunction of Temperature Sensor

The temperature sensor is malfunctioning.

View details →

A6

Fan Motor Error

The fan motor is not working properly.

View details →

A7

Swing Flap Motor Malfunction

The swing flap motor is malfunctioning.

View details →

AF

Drain Level Above Limit

The drain level sensor has detected a high water level.

View details →

C5

Malfunction of Outdoor Temperature Sensor

The outdoor temperature sensor is malfunctioning.

View details →

C9

Malfunction of Subcooling Heat Exchanger Temperature Sensor

The subcooling heat exchanger temperature sensor is malfunctioning.

View details →

CJ

Remote Controller Thermistor Malfunction

The thermistor in the remote controller is malfunctioning.

View details →

E1

High Pressure Error

The system pressure is too high.

View details →
Back to Appliance Error Codes