612 - Would a faulty thermostat affect setting air pumps?

I have a 2007 612 which runs great, but the normal running temps seem to be low. Oil temp rarely gets above 140F and water temp runs 180F. Once, while coming out of a 100ºF freeway run down toward the coast with 20-30º cooler temps, the "ice warning" flashed up on the screen. Seems like a thermostat issue.

That said, could that be a reason why the secondary air pumps won't reset? The car has been driven close to 1000 miles since the battery was off, and every other item has reset. I need the car to pass smog....

 

Would anybody here know at what temperature the thermostat should open in a 2007 612? The incorrect thermostat in mine is opening at 175ºF.