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Foggy windshield

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Old Feb 25, 2010 | 11:53 PM
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Foggy windshield

We got lots of snow the last 2 days. When I went out this evening my windshield was fogged up. It took me about 30 minutes of running the defroster, on hot, with full fan, before it cleared up. Is this normal. Also when I swithed it to the defrost/floor setting the ac symbol lit up on the display. Is this also normal?
 
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Old Feb 26, 2010 | 10:12 AM
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It's normal for the AC to run in defrost mode. The AC system helps pull the moisture out of the incoming air. Check for snow along the windshield. I know if I have a lot of snow on the hood and around the bottom of my windshield it can take a lot longer to clear...
JEV
 
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Old Feb 26, 2010 | 12:39 PM
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Okay, I am going out soon to take the kids sleigh riding and I will clear the windshield of all snow. When I choose defrost it stays on heat but when defrost/floor is choosen the ac comes on.
 
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Old Feb 26, 2010 | 01:37 PM
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I believe the AC works like a heat pump.....can do hot or cold. Mine does the came thing and defrosts fine, Mike.
 
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Old Feb 26, 2010 | 02:14 PM
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Originally Posted by mgs
I believe the AC works like a heat pump.....can do hot or cold.

No it's not like a heat pump, no reversing valve.

The heat from the heater core overpowers the AC.
 
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Old Feb 26, 2010 | 03:14 PM
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Ok....I know if you put it to hot by accident in the summer you cook. I also noticed the fan does not come on in Auto till the engine temp comes up a bit to provide hot defrost/heat....no sense blowing cold air, Mike.
 
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Old Feb 26, 2010 | 03:26 PM
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Originally Posted by mgs
Ok....I know if you put it to hot by accident in the summer you cook. I also noticed the fan does not come on in Auto till the engine temp comes up a bit to provide hot defrost/heat....no sense blowing cold air, Mike.
Yes Mike you are correct.
 
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Old Feb 27, 2010 | 09:11 AM
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JEV is right again...
turn the ac on HOT, direct it on the windshield and it will defrost the fastest ...
on mine (here in North Texus ) it's almost immediate
 
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Old Feb 27, 2010 | 11:04 AM
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thermostat?

Originally Posted by USMC616
We got lots of snow the last 2 days. When I went out this evening my windshield was fogged up. It took me about 30 minutes of running the defroster, on hot, with full fan, before it cleared up. Is this normal. Also when I swithed it to the defrost/floor setting the ac symbol lit up on the display. Is this also normal?
Im a rookie, but taking forever to warm up is a sign of a failing thermostat, right? It might be worth checking out to prevent an overheat.
 
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Old Feb 28, 2010 | 12:16 AM
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Never gave the thermostat a thought, will check it out. I get lots of heat just it was taking a long time to do its job.
 
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