I found unit low on refrigerant. I wrote up all estimates and explained to the customer what each one involved. I found evaporator coil frozen over and we will need to return to leak search. Customer asked me to leave the blower panel off so that it may thaw more quickly. I will put a customer follow up for in the morning. I will also let the dispatcher know. Also customer was there with me when I pulled the blower cabinet off and we both saw the bottom piece of insulation was pulled up close to the bottom side of the blower wheel. Customer pulled this out themselves. I do not believe this was the cause of the freezing up but it contributed to it certainly.