1998 Chevy Blazer Blows Hot Air

GMC
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TJOHNS
  • MEMBER
  • 1 POST
I have a 98 Chevy Blazer. The alternator went up and I had to get it towed. Once I replaced the alternator the vents blow hot air all the time. I have never had this problem before and can't figure out what the problem is. It is winter now, but summer is coming soon. Thanks!
Mar 13, 2006 at 1:30 AM
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GUITARMAN5
  • MEMBER
  • 6 POSTS
Inside the blower box, mounted on the fire wall, there should be a plug w/ a resistor coil, check and make sure the plug is not corroded or the coil is not damaged. Some models you can see, others are inside the box.
Mar 13, 2006 at 1:33 AM
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MVANNESSJR
  • ✓Experienced Mechanic
  • 223 POSTS
The problems may not be related, have a test done on the condensor and make sure the cooling agent is full.
Mar 13, 2006 at 10:12 AM
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Suggested Repair

Have the condenser tested and confirm the refrigerant (cooling agent) is full. The hot-air problem may be unrelated to the alternator replacement.

Conversation Summary

The owner of a 1998 Chevy Blazer says the vents blow hot air all the time after the alternator was replaced. A forum user suggested checking the blower-box resistor plug and coil for corrosion or damage. An expert said the issues may not be related and recommended testing the condenser and making sure the cooling agent is full.

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