RE: Cooling System Mystery - please help

["Randall" <tr3driver@comcast.net>]

> If the temperature was fine without the thermostat, but isn't with it, don't
> all the other variables remain equal?

No, the thermostat provides a significant resistance to flow.  Removing the
thermostat can hide problems like the one I mentioned : an air leak on the
suction side of the pump.

> Is there any condition in which a thermostat can test good in a kettle, but
> malfunction installed?

I have seen them 'stick', although only open, not closed.

Randall