I've not heard of those particular switches being prone to failure (other
than popping out), but other modern replacements are, especially the brake
light switch, so maybe it depends on manufacturer/supplier. A good switch
definitely *won't* operate if it is above coolant level. Other electrical
problems like a partial short on a motor will put more stress on an
otherwise sound switch and cause premature failure. What current are your
motors pulling, say with the engine stopped?
----- Original Message -----
> I have had to replace the thermo fan switch twice in the last two years.
> Are these switches prone to fail?
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