Overheats
Thread Starter
8th Gear
Joined: May 2025
Posts: 8
Likes: 3
Overheats
My 2004 Corvette overheats when sitting for 10 minutes. But when I take off go down the road the temperature comes back to normal it's only when I sit at red lights. Does anyone have any suggestions? I did read that it could be a fuse it could be the the fan or it could be a clogged radiator thank you
Melting Slicks
Joined: Sep 2021
Posts: 2,555
Likes: 1,212
From: Temple Texas
My 2004 Corvette overheats when sitting for 10 minutes. But when I take off go down the road the temperature comes back to normal it's only when I sit at red lights. Does anyone have any suggestions? I did read that it could be a fuse it could be the the fan or it could be a clogged radiator thank you
Open the hood. Start the car and turn on the air conditioner. Look at the fans. Are they spinning? If so it's probably not the fan.
Get under the car and look where the air flows up into the radiator. Do you see a bunch of stuff there restricting air flow? Remove it carefully. For a thorough cleaning you can remove the top plastic part above the radiator and A/C condenser and carefully spray water backwards through them. There are tools to make this easier.
Good luck.
Thread Starter
8th Gear
Joined: May 2025
Posts: 8
Likes: 3
It's not a fuse.
Open the hood. Start the car and turn on the air conditioner. Look at the fans. Are they spinning? If so it's probably not the fan.
Get under the car and look where the air flows up into the radiator. Do you see a bunch of stuff there restricting air flow? Remove it carefully. For a thorough cleaning you can remove the top plastic part above the radiator and A/C condenser and carefully spray water backwards through them. There are tools to make this easier.
Good luck.
Open the hood. Start the car and turn on the air conditioner. Look at the fans. Are they spinning? If so it's probably not the fan.
Get under the car and look where the air flows up into the radiator. Do you see a bunch of stuff there restricting air flow? Remove it carefully. For a thorough cleaning you can remove the top plastic part above the radiator and A/C condenser and carefully spray water backwards through them. There are tools to make this easier.
Good luck.
Thread Starter
8th Gear
Joined: May 2025
Posts: 8
Likes: 3
I was sitting at drive thru for 7 minutes I noticed my air conditioner was not that cold. I looked at the have our said 240 and got almost up to 260. I turned the air off . Going down the road or did cool down.
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Thread Starter
8th Gear
Joined: May 2025
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Maybe radiator needs to be cleaned due to restricted airflow…you can start there.
https://youtu.be/J02kTZblkMA?si=HF_zQsU3wl7LethQ
https://youtu.be/J02kTZblkMA?si=HF_zQsU3wl7LethQ
Moderator, Tech Contributor
Joined: Sep 2013
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From: Cape Coral, Florida
If the AC is not cold it sounds like the fans not working…I’d find an auto electric shop and take your car there.
Thread Starter
8th Gear
Joined: May 2025
Posts: 8
Likes: 3
Cleaned
It's not a fuse.
Open the hood. Start the car and turn on the air conditioner. Look at the fans. Are they spinning? If so it's probably not the fan.
Get under the car and look where the air flows up into the radiator. Do you see a bunch of stuff there restricting air flow? Remove it carefully. For a thorough cleaning you can remove the top plastic part above the radiator and A/C condenser and carefully spray water backwards through them. There are tools to make this easier.
Good luck.
Open the hood. Start the car and turn on the air conditioner. Look at the fans. Are they spinning? If so it's probably not the fan.
Get under the car and look where the air flows up into the radiator. Do you see a bunch of stuff there restricting air flow? Remove it carefully. For a thorough cleaning you can remove the top plastic part above the radiator and A/C condenser and carefully spray water backwards through them. There are tools to make this easier.
Good luck.
Thank you much appreciated!
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Melting Slicks
Joined: Sep 2021
Posts: 2,555
Likes: 1,212
From: Temple Texas
I went under the front of car, the radiator did have debris on top and sides. I cleaned it up with a special fan brush . Went thru a drive thru did not overheat. Did a little drive pulled over and sat there with engine running for 10 minutes. Did not overheat. Thank you for the advice and I'm hoping this does the trick.
Thank you much appreciated!
Thank you much appreciated!
https://www.corvettepartscenter.com/...dams-episode-7
Thread Starter
8th Gear
Joined: May 2025
Posts: 8
Likes: 3
One more thing to check- there should be a 3 piece plastic air dam under the car to direct air towards and up into the radiator. It's a wear item, kind of. They can scrape, especially if the car is lowered. Some people pull them off. If they are missing I suggest you obtain a set and install them.
https://www.corvettepartscenter.com/...dams-episode-7
https://www.corvettepartscenter.com/...dams-episode-7
Tech Contributor
Joined: Jan 2007
Posts: 19,246
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From: Dyer, IN
One more thing to check- there should be a 3 piece plastic air dam under the car to direct air towards and up into the radiator. It's a wear item, kind of. They can scrape, especially if the car is lowered. Some people pull them off. If they are missing I suggest you obtain a set and install them.
https://www.corvettepartscenter.com/...dams-episode-7
https://www.corvettepartscenter.com/...dams-episode-7
Melting Slicks
Joined: Sep 2021
Posts: 2,555
Likes: 1,212
From: Temple Texas