87 5k sq running hotter than normal

[David Howard]

I have an 87 5000S Quattro that has not been driven much as of late and it 
seems to be running hotter than normal but does not overheat.  Even while 
driving, the temp seems to hover right at the point where the aux radiator 
fan comes on.  Any good ideas as to where to start in my quest to lower the 
temp?  Thermostat? Radiator flush? What?

Thanks in advance!

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