The Daikin U4 error code reset is an error code that is associated with the fan speed of the Daikin air conditioner. This error code happens when the fan speed of the air conditioner is set too high.
1. Check the filters and clean or replace them if necessary
1.Open the front cover of your air conditioner. 2.Check the filters. If they are dirty or need to be replaced, do so. 3.Clean the condensation drain pan with a hose and a bucket or tub. 4.Open the bleed valve on the compressor. 5.Check the compressor oil level. If it is low, add oil. 6.Close the bleed valve. 7.Check the refrigerant pressure. If it is low, add refrigerant. 8.Replace or clean any other necessary filters and components.
2. Check the outdoor unit for blockages and clean if necessary
- Open the outdoor unit.
- Look for any blockages and clear them if necessary.
- Check the filters and replace if necessary.
- Look for any damaged parts and fix them if necessary.
- Check the outdoor unit for any errors and reset if necessary.
3. Check the indoor and outdoor units for proper operation and correct if necessary
1.Check the power supply is working by plugging in the power cord and checking the light on the front panel 2.Check the filters for proper operation 3.Check the indoor and outdoor units for proper operation 4.Check the ductwork for proper operation 5.Check the temperature sensor for proper operation 6.Check the power cable for proper connection 7.Check the indoor unit fan for proper operation 8.Check the outdoor unit fan for proper operation 9.Check the wiring for proper connection 10.Reset the indoor unit by pressing the reset button 11.Reset the outdoor unit by pressing the reset button
Still not working? maybe try one of these options:
- If the problem persists, call a qualified service technician.