Ok here goes: the bi-level setting on the Heater/AC control... can that be used with the temp control all the way towards heat? Will that damage the heater core or AC in any way? Reason being I'd love to have heat coming out of both the vents and the floor but don't want to F--- anything up. Sorry if this is dumb but I've never bothered to ask. I've strictly been using either, not both, and i'm wondering why the bi-level is grouped under the "AC" bracket

 

No it won't hurt a thing, you can use it that way if you want.

The reason it's grouped with the A/C settings is because the compressor does run in that position.

BTW the Defrost setting also runs the compressor; the dehumidifying effect that the A/C produces is a big improvement to the defroster operation. In fact, in warm rainy or foggy weather, you will find that the car is much more comfortable if you use one of the A/C positions with a little heat to keep it from freezing you, because it dries the air so much.

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"So many Mustangs, so little time..."
ICON Motorsports

 

Jim,

RB is correct (as usual). In addition to not causing any harm, operating the AC compressor in the defrost or bi-level position keeps the refrigerant oil suspended in the system instead of allowing it to settle out, and helsp keep compressor valves, system seals, 'O' rings, and the exchangers coated with a bit of oil and free from moisture and acids. When summer rolls around, you'll be more likely to have an operating air conditioner than if you never used the compressor for 6-8 months.

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Later,
Vader
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"I know how to solve your problem, but I can't tell
you since you might use the information illegally..."
Adobe Acrobat Reader 4.0

 

Thanks guys! I 1/2 expected a dozen flames. that was very helpful.