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Please recheck the error code. Are you sure the code is P4 and not F4? Carrier does not list a P4 but it does list an F4 error code. F4 means outdoor mid-coil temperature sensor malfunction. Or how about E4? E4 means compressor discharge high temperature protection.
When error occurs in air conditioner, error code is displayed on indoor unit .... Display priority order at overlapping error : E1?E4?E5?P0?P0?P5?P6?t1? ...
Midea air conditioner error codes. Indoor unit error code explanation: R series: ... E1, Indoor / outdoor units communication protection. E2, Zero-crossing signal error ... E4, Outdoor unit temp. sensor or connector of temp. sensor is defective.
Dec 13, 2013 - E4 error code beautyrest electric blanket One side works the other returns an "E4" error code - Simmons Beautyrest Microfleece question.
What is the error code E4 on a chigo air conditioner?
When this error code appears, it means there is a problem with the hose pipe - the heat is being kept in the hose pipe and not being transferred properly.
E4 means return air sensor error, if the error cannot reset may be the return air sensor is out of range or defective. But if the sensor is ok you need to replace the control board itself. The reading of return air sensor is 8k to 10k ohms @ 25deg. C temperature.
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