I completed a level 2 preferred customer cleaning on the Tempstar furnace. The heat exchanger has mild rust. The igniter and flame sensor are both good. The gas pressures are good. The furnace is running safely. I changed the Aprilaire 213 filter media. I used my refrigerant leak detector on the indoor coil and found a couple leaks, the unit is older and it could be beneficial to hear some options on A/C equipment.