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Message:: [QUOTE="skman, post: 12231414, member: 123570"]I've got a 2008 Western Star 14L with a cab heat problem.When sitting an idling (cold winter days) at up to 1000 or so....engine temps will still drop to 130-140.  Of course, then my cab heater temps also drop to a point where it feels like lukewarm air coming out.It's a big bunk so it starts to cool off in there quite a bit.When driving down the highway, it will rarely kick on the fan with the engine temp usually hovering around 185-190 and the cab heat will get warmer but still not great... especially when it's a cold Saskatchewan winter day (even with a full winter front).It's always had this problem but I've just learned to live with it.  But I have drivers in it and they don't like driving it...lolIt had a new head put on a few months ago so I don't think that's the issue...as its been like this for years.  So I was going to change thermostats to see if that will help.Not sure what's in there right now...but which would be the best temp thermostat to keep engine warmer and cab heat hotter??[/QUOTE]