7th Feb 2015, 12:21
When the car over heats at idle, it means that the water pump impeller is going bad, signs that someone was putting water in the radiator and not coolant. I would suggest pulling the water pump and checking the impeller to make sure it's not rusted away. Sometimes it's half gone, and at high speeds will pump and at idle it won't.
Hope this helps.
20th Sep 2020, 13:49
That's funny, if the speeds don't work on the blower but the blower works fine, why replace the blower? Cars for years use a thermo element that bolts in by the blower etc. It controls the speeds by resistance and different circuits for each speed. You can buy a new one online for under ten bucks.
2nd May 2011, 21:42
My car did the same thing. I put on a new water pump and 180 thermastat and that solved the problem. Later I put in the coolant, an additive called Royal Purple, which is keeping it a little cooler too (between 180 and 195 degrees).