Defrost. - Toyota Yaris Forums

barryware · 01-04-2007, 05:49 PM

Actually... When the front defroster is on you MUST use outside air, not recirculated (I know that has been covered). I crack open a side window just a bit also which helps a lot.

My 07 liftback has three knobs in the middle. Top is fan speed, outside of the fan speed knob is the fresh air / recirculate selector, center knob is the selector knob for where you want the air to come from, and bottom is your temp setting.

If you look closely at the center knob, it has a little graphic near the defrost selection telling you to use the fresh air selection for defrosting / defogging.

There is also a button in the center of the middle knob that allows you to turn on or off the AC compressor. The compressor does not have to run all the time.

I have a scan gauge connected which gives the actual engine temperature, not just the Cool / Hot light.

If it is cold out, it takes quite a bit of time for the engine to get over 150F or so ESPECIALLY if you have your heater fan set faster than 1. At a red light, if you turn the fan up to 3, you will actually start cooling down the engine. I don't know what happens to the temperature if you use 4. 3 scared me.

If you want your engine to warm up faster, leave the fan speed on 1 for a while. Not a lot of heat creating horsepower under the hood.

01-04-2007, 05:49 PM	#18
barryware Drives: 2007 Yaris Liftback Join Date: Sep 2006 Location: Chicago Posts: 129	Actually... When the front defroster is on you MUST use outside air, not recirculated (I know that has been covered). I crack open a side window just a bit also which helps a lot. My 07 liftback has three knobs in the middle. Top is fan speed, outside of the fan speed knob is the fresh air / recirculate selector, center knob is the selector knob for where you want the air to come from, and bottom is your temp setting. If you look closely at the center knob, it has a little graphic near the defrost selection telling you to use the fresh air selection for defrosting / defogging. There is also a button in the center of the middle knob that allows you to turn on or off the AC compressor. The compressor does not have to run all the time. I have a scan gauge connected which gives the actual engine temperature, not just the Cool / Hot light. If it is cold out, it takes quite a bit of time for the engine to get over 150F or so ESPECIALLY if you have your heater fan set faster than 1. At a red light, if you turn the fan up to 3, you will actually start cooling down the engine. I don't know what happens to the temperature if you use 4. 3 scared me. If you want your engine to warm up faster, leave the fan speed on 1 for a while. Not a lot of heat creating horsepower under the hood.