Quote:
Originally Posted by azitizz
When I am driving on a highway and get to just over 100km/hr (60mph) or so the heat stops coming out of the vents and the engine temp rises fairly quickly. The fan continues to blow however.
I have to decelerate to less than 80KM/hr (50mph) in order for it to switch back to blowing hot air and decrease the engine temp.
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Try covering the thermostat housing with some cardboard. If you truely do have to slow down to get the engine temp back down, just waiting a few minutes isn't enough, then there's more going on than just the monovalve.
I'm thinking maybe the thermostat won't open because it's getting a blast of frigid air at 100 km/hr that it doesn't get at 80 km/hr. Covering the housing with cardboard to deflect any such blast should change the behavior enough to tell if that's part of the story.
Personally, I'd be more concerned with the engine temp than the cabin heat, but then I don't live in Winnipeg
