My 04 also doesn't warm up unless I'm driving. I run it close to 20 minutes every mornin and it'll be under 1/4... about 2 miles down the road it will hit right at the half line. Park it and let it run and it'll creep down to 1/4... The heater blows warmish air unless it's in recirc mode than it'll blow hot, but it'll fog out big time in a few minutes. The 4 parts stores in town only have the stock rated 195* T-stats in their system. I havn't looked online yet. I was hopin for somethin hotter like A 205* I just put in my truck.... I just put in a block heater and did a full coolant flush. I just assumed these Tiny motors don't make enough heat to blow hot when it's super cold outside... It's why I'm drivin my 496ci 8.1L today