For the evaluation I showed up to the homeowner's house and he informed me the upstairs was blowing only warm air when the thermostat was set to 73°. On inspecting the air handler I noticed it was not running at all and the five amp fuse was blown. I replaced the fuse and moved on to the condenser where I gauged up and was getting negative one PSI on the low side and 23 PSI on the high side. This is an r22 unit that is 22 years old and has a significant leak somewhere in the EVAP coil. I formed the customer of his options and pricing of refrigerant as well as replacing the coil and he elected to set a meeting with a Comfort Adviser for tomorrow 17 April.