It is rather unusual for the otterstadt switch to fail so quickly and in such rapid succession. I suggested the Fanzilla because I am guessing that the fan relay is no longer there (jumpered out) so the otterstadt switch is carrying the full load (that could be the cause of the failures). I also don't know what fan fail relay or jumper is in there so by recomending the Fanzilla it solves those problems. To use the old style pipe you have to cut it shorter, rotate the pipe, and replace the hose to the water pump. It is rare to see the older version but never say never! I see many Deloreans that have not had any of the recalls and still have the Ducey alternator. Remember I am trying to help by remote control and the person asking for help doesn't always clearly and fully explain the situation. I like the Fanzilla because not only does it elagantly solve the origional wiring design problems but it is also easy for almost anyone to install themselves. BTW when installing the Fanzilla I recommend replacing the otterstadt switch AND SEAL and circuit breaker. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, Martin Gutkowski <webmaster@xxxx> wrote: > David Teitelbaum wrote: > > >Check that you have the updated version of the pipe that the switch > >fits into, the switch should be on the BOTTOM of the pipe. The earlier > >style had the switch on top and an air bubble would get caught under > >it and then it didn't work right. Put a Fanzilla in so the switch > >isn't carring the full load of the fans. > > > What?! The otterstat switches a RELAY to turn the fans on, Zilla or no > Zilla. >