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"This sounds like a classic case of an overcharged system or a failing starter relay. If the technician put too much gas, the high pressure will overload the compressor and cause it to trip.Alternatively, a weak start capacitor or relay is struggling to keep it running. Have a technician check the operating pressure and test the relay before assuming the compressor is dead."

"Hey! An E4 error on a Haier washer just means the machine isn't getting enough water. It’s an easy DIY fix. Just check these 3 things:Check the tap: Make sure the water valve connected to the machine is fully open.Check the hose: Look behind the machine and make sure the water pipe isn't pinched, squashed, or bent.Clean the inlet filter (Most Common): Turn off the tap, unscrew the hose from the back of the machine, and pull out the little plastic mesh filter inside the valve. Give it a quick scrub with an old toothbrush, put it back, and reconnect the hose.This fixes the E4 error 9 out of 10 times. Hope this helps!""

"In my experience with Haier inverters, E7 is often just a loose or corroded wire at the terminal block rather than a completely dead PCB. Because the outdoor unit vibrates constantly, the signal wires can slowly slip out of their slots over time, or develop rust on the copper contacts.Before you think about replacing any expensive boards, ask a technician to clean the terminals and tighten the signal cable on both ends.Also, have them check the outdoor fuse, as a simple blown fuse on the outdoor board cuts power to the unit completely, mimicking a communication failure."