Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - Why does cold air on my TOYOTA 86 come off as hot ? Without AC on.

n2oinferno · 02-17-2014, 04:26 PM

I'm not an expert in HVAC so someone correct me if I'm wrong.

If you don't have the AC then the system isn't cooling the air. It's just pushing air into the car, so you're pulling in warm air. This is how it is with every car. You can make it warmer, but only as cold as it can pull in.

Your windows getting steamy are another side effect of not using the AC. The AC actually dries the air out. What you're seeing is the moisture in the air settling on your windows because of the difference in temperature outside versus inside. Kinda like how a glass will sweat if you leave ice water in it, I suppose. The same thing can happen when it's cold outside and you have the AC off, blowing hot air.

02-17-2014, 04:26 PM	#4
n2oinferno Praise Helix! Join Date: Jan 2011 Drives: Accord 2.0T, Silverado Location: Upstate SC Posts: 2,859 Thanks: 428 Thanked 2,208 Times in 1,072 Posts Mentioned: 11 Post(s) Tagged: 1 Thread(s)	I'm not an expert in HVAC so someone correct me if I'm wrong. If you don't have the AC then the system isn't cooling the air. It's just pushing air into the car, so you're pulling in warm air. This is how it is with every car. You can make it warmer, but only as cold as it can pull in. Your windows getting steamy are another side effect of not using the AC. The AC actually dries the air out. What you're seeing is the moisture in the air settling on your windows because of the difference in temperature outside versus inside. Kinda like how a glass will sweat if you leave ice water in it, I suppose. The same thing can happen when it's cold outside and you have the AC off, blowing hot air.