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A/C vs Defroster on Cold MPG in Prius

Created July 2, 2006, at 9:03 pm by Anonymous

Has anyone come across data indicating how much more MPG running the defroster on cold saves than running the A/C?

The manual seems to indicate that no damage would be caused by running the defroster on cold for extended periods in hot weather, and it seems to cool w/out putting nearly as much drain on gas and electric engines.

Thanks

Anonymous

5 years ago

The defroster is run by the air conditioner, so there should be no difference between the two.

Anonymous

5 years ago

No difference. The only problem with using A/C Auto is at times your car may start cooling the cabin when it really is not needed. So 8 months of the year I keep the AC off.

Glen Buckley

30 weeks ago

I have a 2010 Toyota Prius and I am wondering how it will defrost a cold windshield first thing in the morning? Canadian winters are cold!

Glen Buckley

30 weeks ago

What powers the defroster on the 2010 Toyota Prius on cold Canadian Mornings. Am I going to have to wait for the engine to warm up or is there an electric heater as well?

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Mr.Bear
Senior Member

28 weeks ago

The A/C and the defroster both engage the compressor. I'm pretty sure the compressor runs off the hybrid battery.

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