Hello, I have a 2007 X 2.5 NA. 174k miles. Coolant level is normal, but the heat nor the a/c works consistently. The heat will be warm... then driving down the road it will get cool...then back to warm. Sometimes it will stay hot the entire time just idling in the driveway. Engine temperature never gets above or below normal operating Temp. The vent blowing also blows out the same pressure from the “feet” to the “face & feet setting. I have ran out of ideas...reaching out for help. Thank you!