The Daikin C4 error code typically means a problem in the indoor thermistor. It is also possible that the indoor sensor coil is reading temperature fluctuations due to insufficient refrigerant gas present in the system. If it’s the latter problem, a gas top-up (with a minimum price of $50 for R22 and $80 for R410) can clear the C4 error. If the indoor thermistor is faulty, replacing it will cost $150 depending on which aircon model you are using.
A Daikin C4 error is an indication of a problem involving the heat exchanger’s sensor or liquid pipe thermistor. It either points to a faulty contact point in the connector or a defect in the indoor sensor associated with the heat exchanger. A C4 error happens when the indoor heat sensor gets disconnected or is short-circuited. The tripped circuit may be due to insufficient gas refrigerant levels that could lead to damaging temperature fluctuations in the indoor sensor coil.
To find the C4 error code, get the aircon remote first and make sure that it is set for controlling the indoor aircon settings. Press the remote’s timer cancel button for at least five seconds. A long beep will sound and the temperature display will shift to an error code display. You should be able to immediately find the C4 error code on the display after this.
Error codes are useful aids for self-diagnosing issues with your Daikin air conditioning unit, and since the C4 fault might point to an underlying electrical cause, rectifying the problem can start just as easily with a hard reset to clear the system. Hopefully, a hard reset is enough to clear away the error. Turn off the aircon using the remote control and then unplug it from the power socket; wait for a few minutes before restarting the unit. Then do a reset remotely. To do a remote reset, hold down and then release the On/Off remote button of your Daikin unit; do this three times. If the C4 error persists, then consider getting professional assistance.
Depending on the type of thermistor–and in this case, the thermistor associated with heat exchange–the replacement cost typically ranges between $150 and $250. Silverback Aircon has a stable of in-house Daikin specialists who can provide free consultation through Whatsapp on the installation, maintenance, and repair of your Daikin air conditioning unit; we can also give you a quote on the likely cost of repair and replacement. And, if parts of the aircon are deemed to be damaged beyond home-servicing and need to be replaced, Silverback Aircon has an existing array of professionally maintained and refurbished spare parts for Daikin models.
In case low or inadequate refrigerant gas levels are found to be causing the tripped circuit (which is triggering the persistent C4 error code), Silverback Aircon also has a ready solution for that scenario. We offer different options for aircon gas top up servicing. We will be glad to quickly get your Daikin aircon back in good working condition again. Prices for Silverback Aircon gas top up are dependent on the refrigerant gas type and, if applicable, a much-needed chemical overhaul to go with the top-up process. The prices are as follows:
A Daikin C4 error that you cannot clear using basic troubleshooting techniques will require professional assistance from qualified service technicians with field experience in identifying the actual cause of the C4 fault and solving it. There’s a number on the right hand side of the fan coil. That is the model number of the Daikin indoor air conditioning unit. Additionally, look at the invoice to determine the Daikin condenser unit’s model number. Please write the two model numbers down and talk to us at Silverback Aircon.
Consultation is free. We can help you with your Daikin C4 error, as well as with other Daikin aircon error codes.
