Alfa drivable again!
Join Date: Jul 2011
Location: United Kingdom
I would have thought your heater failure is unrelated to your aircon gas levels. More likely to be the switch on the dash, a fuse gone or the blower motor has failed. Or just possible the intake/ pollen filter is totally clogged, or (reaching for straws here) your heater matrix is clogged up.
I have used innotec turbo cleaner, it does seem to help. Wish I knew more about your particular model of Alfa, but if the turbo is electrically operated, and the variable vanes cannot move thro their full travel, that could account for the fault code showing voltage too high. The innotec treatment might well free that up. Rather than just taking her to a garage, a better bet would be finding an Alfa specialist familiar with your car.
I hope that helps you, best of luck