We will explain error E3 in various air conditioning brands.
Let’s begin by saying that error E3 can indicate a fault in the indoor unit’s fan or blower, located inside the premises. This cause is applicable to the following air conditioning brands:
- Carrier
- General Electric
- Midea
- Samsung
- York
- Olimpia Splendid
- Bosch
- Daewoo
- Westinghouse
To resolve issues with the indoor unit’s fan, it is recommended to:
a. Check the condition of the capacitor, as a faulty capacitor can result in slow fan speed.
b. Inspect for unusual noises when rotating the blower’s turbine or any obstructions, which may arise from blower bearing problems.
c. There might be issues with the fan speed sensor, often an effect hall sensor.
d. Verify the fan power connections and the current supply relay.
Now, the meaning of error E3 can be different.
The cause of error E3 may be a lack of refrigerant gas or very low gas pressure. In this case, it is necessary to check for a leak. The brands associated with this meaning are:
- Trane
- Gree
- Haier
- Electrolux
- Sharp
- Kelvinator
When the air conditioning unit is lacking refrigerant gas, its electrical current consumption is lower than normal. You can use an ammeter clamp to confirm the presence of the issue.
Visually, you can observe oil stains on pipes, connections, indoor and outdoor units, resulting from the leak.
For the Trotec brand, error E3 is due to an issue with the evaporator temperature sensor.
For problems with the temperature sensor, it is recommended to disconnect it and measure its resistance using a multimeter. Its value should match the one indicated in the manual and should never be infinite.
For the Fujitsu brand, error E3 can be related to a short circuit in the local air temperature sensor.
For the Toshiba brand, Error E03 occurs when there is a connection error between the indoor unit and the control panel.
For the brands Mitsubishi Electric and Panasonic, error E3 indicates a communication problem with the remote control. No control signal is being emitted.
For Daikin, error E3 probably originates when the high-pressure switch is activated due to excessive pressure or a power failure that affects the transformer, causing the sensor signals not to be interpreted.