First off the car is 2006 ST. I bought it used a few months ago, and it has 40k on it.
As many of you know it is cold up here in the northern states.
So I noticed this a few weeks ago but it didn't start to bother me until lately when the mornings have been below freezing.
I'll warm my car up in the morning. When I get in to go, the engine will be up to temp. but there is not heat coming from the vents/defroster. It will take a long time before heat eventually starts to come out. However it does not produce any heat while the car is at idle or under 2000 rpms.
Is this a thermostat issue, or some kind of sensor?
When I'm driving on the freeway it doesn't bother me cause it's nice and warm, but a lot of my driving is stop and go and the car never warms up much.
Help me out, I'm cold!!!