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07-22-2018, 06:27 PM
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#1 | |
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AF Enthusiast
Join Date: Feb 2004
Location: new orleans area, Louisiana
Posts: 703
Thanks: 12
Thanked 2 Times in 1 Post
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a/c direction problems=--
98 base lumina, 3.1 about 275,000 miles on it.
Problem =--a/c often defaults an blows cold thur the defroster area. My mobile mechanic is honest and highly skilled, drives a lumina and has been to Chevy factory training in Lumina days. I bought a new vacuum resevoir ball. He tried that idea. He tested several vacuum lines and did various things all with no success. He thinks it may have something to do with one or two solinoids under the dash , behind the glove compartment. Any idea,s will be appreciated. It is very toasty in south Louisiana nowadays. |
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07-23-2018, 01:41 PM
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#2 | |
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AF Fanatic
Join Date: Jul 2011
Location: Worcester, Massachusetts
Posts: 5,017
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Thanked 618 Times in 610 Posts
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Re: a/c direction problems=--
Very simple to test the system with a hand held vacuum pump....if the actuators are vac operated...
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07-23-2018, 08:46 PM
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#3 | |
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AF Enthusiast
Join Date: Jul 2005
Location: the Seasonally Frozen Wastelands
Posts: 892
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Re: a/c direction problems=--
"Defrost" is the default position for the HVAC system, because that way you're sure to have a frost-free, clear windshield.
He replaced the "ball" reservoir, but did he ever test the vacuum tubing to see if it holds vacuum? I've had multiple failures in the vacuum tubing (brittle crap) that had to be spliced with rubber vacuum hose. (This is on a '92 and 93 Lumina. I suspect but don't know for sure that the newer ones use vacuum-operated air doors rather than electronic actuators.)
__________________
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07-24-2018, 07:49 AM
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#4 | |
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AF Enthusiast
Thread starter
Join Date: Feb 2004
Location: new orleans area, Louisiana
Posts: 703
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Re: a/c direction problems=--
thank you to Tech II
and thank you to Schurkey. |
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08-28-2018, 07:24 PM
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#5 | |
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AF Enthusiast
Thread starter
Join Date: Feb 2004
Location: new orleans area, Louisiana
Posts: 703
Thanks: 12
Thanked 2 Times in 1 Post
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Re: a/c direction problems=--
a quicky solution=
I placed a small fan on the dash blowing into my face on defrost mode. It ain,t perfect, but it,ll do. Occasionally try a/c or max and if it works leave it like that . |
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