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Message: <blockquote data-quote="Quarter Horse" data-source="post: 1208149" data-attributes="member: 18844">Well Guys...... I am STUMPED!!!! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown    :(" loading="lazy" data-shortname=":(" /> Been driving the Car back n forth to work and the Fan issue is VERY STRANGE to me. Doesn't matter what condition I put the Car in, as soon as I go to Start the Car the Fan comes right on with the ignition on?? It does Cycle but randomly and I even tried turning the AC on and there is NO High Fan mode that comes on..... No Fan at all sometimes(Just depends if the fan cycle is on or off..... But it never changes Speed??).This all started happening after changing the Radiator(Old one was leaking)and changing the Thermostat to a MR. Gasket 180* one & a Moroso 18-20lb Cap. (Could my problem be because of this???) I also did a Full Tune up, as I described above. Another weird thing is when the car is fully Warmed up(Gauge is showing around 190-200*) I tried to Squeeze the Top Rad hose to see if the Thermostat was open and it's hard as a Rock, I Carefully tried to remove the Rad Cap...... and NOPE, System is completely Pressurized like the thermostat is closed. However the Car never gets Hot so I don't understand how this could be?? Does anyone have any thoughts or suggestions I can try? Really thinking about changing the Thermostat back to a 195*....... I just find this really hard to believe that would affect the Fan coming on @ Start up and the Weird Cycling condition I'm having? Oh Ya, I also have a Check Engine light that will pop on and then go off..... WTF???? <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite4" alt=":mad:" title="Mad    :mad:" loading="lazy" data-shortname=":mad:" /></blockquote>