I have now suffered the same issue with a combusting air con unit. Fortunately I managed to get home by turning off the AC (and opening the windows to let the smoke out...) Pump had been noisy for a while but actually got quieter recently.

Anyway, I've looked on the Rockauto website (as I don't want to pay the government for import duty) and there are lots of options. I don't want a remanufactured unit, but that leaves me with Denso, Four Seasons, Spectra Premium and GPD. Any ideas which is the 'right' one to go for?

Thanks in advance