The customer has a Gree mini split system. Ever since it was moved down lower he has had a p5 error code. Spoke with tech support and this a overheating issue. The filter was plugged. Cleese dit but still had pressures over 600psi in heating mode. The tech support seems to think the system was over charged. Gave the customer a price for the work to be done and what was recommended by tech support. He will call when he wants the work done.