Upon arrival no high voltage to condenser unit, tripped breaker because of loose wire connection. Reset breaker and condenser came on. Checked refrigerant levels and system has low suction pressures, customer isn’t aware of any filtration on the system. More than likely evaporator coil is clogged. Crawl space has fleas and the customer will be exterminating before it can be checked. Will call when crawl has been exterminated.