Hi John,
I'm in a similar situation and looking at a replacement unit P/N 7035035. It would be a great help if you could confirm if you got the replacement unit to work, and if you needed to swap the frost protection sensor or anything else?
In case it’s of any use to anyone else, my failed motor is on a Passivent ihybrid HR1. I've discovered the Passivent was originally made by a company called ITHO and brought into the UK and sold by Heatrae Sadia as the Advance / Advance Plus. It was then rebadged and sold by Passivent for about three years around 2010.
Thanks, Niall
