Noticed my temp gauge is running barely below the orange it was 45 degrees here in reno on my commute didn't notice this the last time I drove it but that was a week or so ago maybe thermostat is stuck its a 03 h2 62k miles oh btw. I had the heater on 90 and fan running full for about 25 minutes at 75 mph. it was heating fine just looked down and noticed this the h2 hasn't been driven much from the previous owner. I got in the h2 today after it sat for 6 hours in 40 degree weather the gauge read 210 immediately and then went up to 240 all the way home 35 miles 45 degree weather. stopped at the store 15 minutes started it up the gauge pegged all the way to the right no other warnings came on the coolant was only warm not boiling or anything deove 4 miles popped hood all appears to be normal the anti freeze is normal temp no overheating signs at all. the air was coming out at normal temp when I had it on 90 degrees to see if it was abnormally hot. THX in advance 4 any advice