Important Breakthru In Fuel Efficiency!

[bronsin]

Originally Posted by CTScott

When you go into defroster mode the AC compressor automatically runs, and when that runs the radiator fan automatically runs, so you are definitely correct that defrosting delays getting the engine warmed up.

If you do the mod to unlink the automatic AC with defroster, you will still be able to use the heat to clear the windshield, without causing the radiator fan to run.

I figure even running the heater cools the coolant in the heater core and prevents as quick a warmup. Of course once warmed up it would not hurt anything to run the heater...

My case is special cause my 6 mile trip is 2 or three miles at non warmed up temperature. What would be saved if you could cut that to a mile at non warmed up temp. I dont know.

Wheres that defrost mode without AC mod?