[Fot] TR4 water temp. fan switch question

[TeriAnn J. Wakeman]

Bob Adams wrote:
> Just run it on a toggle and flip it on when the motor is up to temperature.
> The potential for failure is higher with a "sensor" than a toggle switch.
>   
Umm, maybe for you but I find that my toggle switch sensor often gets 
distracted and might only activate the toggle switch upon sensing steam 
emerging from the bonnet.

I find that an electrical sensor  has fewer distractions and is much 
more reliable than the one behind the wheel.  However a toggle switch in 
parallel to a sensor & its relay makes for a sensible backup system.

I tend to set my fan sensor to activate the relay 5 to 10 degrees higher 
than the thermostat opening temperature.  TR3 radiator caps don't have a 
very high pressure rating and I prefer my coolant to be in the colling 
system and not the catch bottle.

Teriann