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Error Code
The E3 error code indicates a high-pressure issue in your Carrier air conditioning unit. This error occurs when the refrigerant pressure rises above normal levels, which can cause system damage.
Dirt or debris buildup can cause the system to overheat and trigger high-pressure protection.
Low refrigerant can disrupt refrigerant flow and cause high pressure.
A malfunctioning pressure sensor can give inaccurate readings, causing the system to shut down.
Ensure that the coils and filters are free from blockages.
Have a technician inspect and top up the refrigerant.
A technician can inspect and replace the faulty pressure sensor if needed.
