Defroster question
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From: Morehead, Ky.
Defroster question
I have the manual HVAC controls. 2012 XL. I have noticed a couple of oddities lately.
In Park the defroster is running at a high speed, but when I put the tranny in gear, the blower speed changes.
It could be that a door closes, or something.
And another thing is the defroster works good at removing exterior frost/ice, but leaves a large triangle in the upper left hand corner, untouched.
It takes a long time to clear that part of the windshield.
Any idea's/suggestions appreciated. Jim
In Park the defroster is running at a high speed, but when I put the tranny in gear, the blower speed changes.
It could be that a door closes, or something.
And another thing is the defroster works good at removing exterior frost/ice, but leaves a large triangle in the upper left hand corner, untouched.
It takes a long time to clear that part of the windshield.
Any idea's/suggestions appreciated. Jim
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No, It is usually warming up and defrosting the windshield. I put in in gear and in a few seconds, it just starts to make a lower sound. I really don't notice about the actual air output.
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Update: Volt Meter says 11.8 at key on. 14.3 after start and defroster on. During the shift that causes the blower speed change, it momentarily goes to 14.4, and then back to 14.3. Really funny.
I suspect it is something with the vacuum system.
Last edited by hammer65; Jan 23, 2014 at 04:55 PM. Reason: update
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From: Illinois
Is the interior of the truck ice cold when you're seeing this issue? When you set it on defrost, are you feeling it full bast in defrost?
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From: Morehead, Ky.
Sammy: Are IFyou asking about the frost on the windshield? Ist pix after 15 minute warmup from 0 deg. 3rd and fourth pix after another 10 minutes.
If you are asking about blower speed, then any time you shift from Park to drive.
Plenty of air apparent at all times.
If you are asking about blower speed, then any time you shift from Park to drive.
Plenty of air apparent at all times.
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From: Illinois
Fwiw, I had a similar thing going on with my truck only when it's very cold. It's only happened twice but it was -5 and -13F both times. My windshield had frost on the inside still after 10minutes of driving and 10minutes of idling.
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