Re: EF thermo fans on EB2
There are two wires for each fan.
You have two options. You can either a) run one fast fan for warm and two fast for hot or b) set it so the current runs through both fan motors (connect in series) for warm so they both run slow for warm and then wire them so for hot they are fed current seperately and both run faster. In any event you will need at least two and up to three relays.
Surface mounted thermatic switches are better (don't leak) and much cheaper than the in hose type. I did some psots on this before in the Clevland part of this forum. I will find them and give you a link in a momemnt.