Samsung Air Conditioner Error Code E445

E445 indicates a CCH (crankcase heater) malfunction combined with a sump sensor miswiring fault. The error appears when the PCB detects that the CCH connector is not properly connected to the board or the sump temperature sensor has become detached from the compressor. Both conditions prevent the system from confirming safe crankcase heater operation.

Running the unit with an active E445 error is not recommended. The crankcase heater is a protective component that keeps compressor oil from absorbing refrigerant during off cycles. If the heater is non-functional and this goes undetected due to a sensor fault, starting the compressor with refrigerant-saturated oil can cause serious and costly compressor damage.

If the fix is only a loose connector that needs reseating, costs may be limited to a service call fee, typically in the range of $75 to $150. If a sump sensor or CCH heater element needs replacement, parts and labor combined could range from $150 to $400 or more depending on the unit model and local labor rates. Compressor damage resulting from an unaddressed CCH fault would be significantly more expensive to repair.

If the issue is simply a loose CCH connector at the PCB, a knowledgeable DIYer can reseat the connector after safely disconnecting power to the unit. However, accessing the compressor sump area and inspecting the sensor mounting typically requires opening the unit cabinet and working near refrigerant components, which is generally best left to a qualified technician. Any work involving the electrical components of the compressor circuit should be performed with the unit fully powered down.

A power reset may temporarily clear the E445 error display, but the code will return if the underlying cause is not resolved. The connector, sensor mounting, and wiring must be inspected and corrected before the error clears permanently. Repeated resets without addressing the fault risk compressor damage over time.