80x80x25mm Is the size of these fans,they are nearly if not the same as computer cooling fans,they are 12 volt so no risk of electrocution,I have just replaced mine recently I bought them from "eBay" where else.paid about £17.00 for two inc P and p you don't need the originals from thetford because they take your eyes out for price.
The company is called Semicom this is the part number you would need to find it on eBay,
ME80251V1-A99 Fan DC axial 12VDC 80x80x25mm 69.7m3/h 33dBA Vapo,
You can find the dismantling proceedure on the WWW, BUT REMEMBER YOU NEED TO BREAK A GAS JOINT TO REMOVE THE COOKER FROM THE HOUSING,so leak test or carry out a soundness test after you reinstall the oven,good luck!!!
One other observation is these fans have no reverse polarity protection which means there could be a slim chance that if you connect the battery the wrong way you could damage these fans,infact blew the circuit board within them? I'm not a 100% sure because they might and it's only a might get there supply from the 12 volt supply from the charging system,but thinking about this that would mean that the fans wouldn't work if you were not on mains hook up,so the 12 volt supply must come from the battery?
Steve wilson, November 2016
