upon arrival was directed to the basement where air handler is. Customer has dogs and advised me not to go upstairs where the thermostat and filters are located. Asked customer to engage the aux heat which kicked on as it should. Each of the legs were amping at 20.00 within correct range per manufacture specifications. When inspecting blower found light dust build up and when testing the amps it was 2.91 which is still within range when inspecting the capacitor for the blower which it is a 10 mfd it read at 7.72 which is below manufacture specifications recommend replacing it. Inspected coil found some debris build up in the top corner of the coil. Asked customer to adjust it back to normal heat. When approaching outdoor could see damage to the coil it had been deteriorating from the dogs urine and has holes through out bottom of the coil. Customer was aware of the systems issues due to financial pressures they were not concerned to fix the system