Jerrys1990
OBS Enthusiast
Couldn't find a clear cut answer during search. My '90 has weak heat now that it's getting cold out. I warm it up 10-15 mins before I leave and the output is luke warm at best. Even driving freeway to work, it doesn't really get "hot." Assuming the thermostat is the correct 195 degree piece, do these trucks just have crappy heat? The temp gauge, which I don't really trust anyway, doesn't read where I would think it should for 180-195 degrees. Blend door is electronic and appears to be opening all the way. Though, the HVAC controls don't like to work when it's this cold....took a few minutes for it to respond to button pressing. The low speed fan relay chatters too but that'll be a separate post. Anything I should check before I replace the thermostat and coolant?