front window fogging up
Thread Starter
1st Gear
Joined: Sep 2006
Posts: 1
Likes: 0
front window fogging up
Hi guys, this is the first time on this site my problem is when i
start the car up the front window fogs up. i checked the heater core and it's good. this does'nt happen all the time. the temp outside has a lot to do with it when this happens. thanks
start the car up the front window fogs up. i checked the heater core and it's good. this does'nt happen all the time. the temp outside has a lot to do with it when this happens. thanks
Safety Car
Joined: Mar 2005
Posts: 4,723
Likes: 11
From: Winnipeg Manitoba, Canada
I take it the passenger carpet isn't wet? Does the fog on the window leave a greasy film? Do you smell coolant? If not then its not the heater core. Heres a thread about your problem.
http://forums.corvetteforum.com/show...ght=fogging+up
http://forums.corvetteforum.com/show...ght=fogging+up
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Some of the GM electronic hvac's actually have a built in purge function wherein the air is directed out of the heater vents at startup to prevent this. It's not perfect. Do check the Evaporator weep hole/drain. Any moisture left in the case will make it worse.
Team Owner
Joined: Jun 2005
Posts: 46,295
Likes: 2,596
From: Northern, VA
St. Jude Donor '15
"In honor of jpee"
I'm wondering (out loud) if a partially blocked a/c drain could cause this on start up. It's a question, not an answer.
Other than that, actively make certain your car's a/c and heat are turned off when you shut off the car. Then, in the morning at first start, see if it still happens. I'm thinking here, residual moisture in the system.
I'm leaning toward SunCr's suggestion/idea, tho.
Other than that, actively make certain your car's a/c and heat are turned off when you shut off the car. Then, in the morning at first start, see if it still happens. I'm thinking here, residual moisture in the system.
I'm leaning toward SunCr's suggestion/idea, tho.
Race Director
Joined: Dec 2002
Posts: 13,348
Likes: 233
From: SCMR Rat Pack'r Charter Member..Great Bend KS
Originally Posted by cuda70
when i start the car up the front window fogs up. i checked the heater core and it's good. this does'nt happen all the time. the temp outside has a lot to do with it when this happens. thanks
The drain in the evap/heater box is clear, so that isn't it...but something is doing it. I'm guessing it's the slight amount of condensation on the evap, in which case there is nothing to be done.
Larry
code5coupe
