Pinto 2.0 Electric Fan

[Jonty Wild]

After a gap since buying my RH 2B Plus and am working on it to starting using it.

I have been looking into some overheating issues which I may have resolved (just done many things including removed the incorrect gasket covering a third of the hole!) - time will tell!  However, I have noticed an issue with the electric fan, which is wired via a thermostatic switch in the coolant system (which is earthed) and a manual switch on the dash - both continue to operate after the ignition is off, the fan had stopped coming on automatically(not the source of the overheating!).  I bought a new thermostatic switch, but when I took the original (90 degrees) out and tested both, the new one did not work and the original did, so I cleaned it up and put it back in.

The fan now turns on correctly with both switches, but is not turning off when the temperature drops significantly. If I disconnect it at the thermostatic switch and reconnect it immediately, the fan does not restart (only tested this with ignition off), but does start and stop with the dash switch (as expected). I also noticed once, that when I switched the dash switch on and off (ignition off), the fan stopped, but has this hasn't happened again, so far, it may have been coincidence. I am now wondering about the wiring or the thermostatic switch.  I thoughts, ideas suggestion?

If others think that it is still worth changing the thermostatic switch anyone know a supplier of the small thread diameter, so that I don't need to change the housing?

Also, mine is the single connector variety, as the new one I bought (double connector) doesn't work, can I check my logic for the double connector type (which seem easier to get) do both connectors have the same function when the the thermostatic switch is on (hot) - I'll describe that as both +, or is one + and the other -?

Edited May 7, 2024 by Jonty Wild
grammar

[IanS]

I would expect that a 2 connector switch works by connecting both connectors together above a set temperature, with both connections being isolated from the body of the switch.