Super tune up performed today on a 9 year old a Trane heat pump. All electrical connections are tight with no corrosion. Drain safety switch installed today. Blower wheel and evaporator coil are clean. All amp draws are within spec. Compressor and condenser fan motor are acceptable. Refrigerant levels are in range. Outdoor unit was washed and waxed. Outdoor disconnect had fused and had come loose from the wall. Replaced disconnect safety today. Call for plumber has been set for a leaking T&P valve on the water heater.