For the situation of the customer's home and he stated the indoor unit was running but the outdoor was just making a loud buzzing sound. When I went outside I noticed there was an extremely loud buzzing coming from the electrical compartment. When I opened it up there was a bunch of ants inside the contactor, not allowing 240 volts to the compressor. I swapped out the contactor and gauged up where I had a below freezing saturation temp extremely high superheat and low subcool. Customer would like to speak to a CA about replacement.