Is this normal? I just found out today after heading back from work. It is about 30 degree outside today in Southern Maryland. After I get home from work (about 20mins driving), I checked the Lower Hose (radiator) is cool instead of warm or hot. I did set the Heat Control to HotSide and turned the heat on @ #1 and the heat came out fine. Just wonder is this normal?? Should I check my Thermostat?? Like I said above, I just replace the Thermostat (OEM from Dealer) about 2 month ago. Please help.