1996 Chevy Silverado BLOWS HOT AIR ALL THE TIME

146,000 MILES • V8 • 4WD • AUTOMATIC
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MBARBER
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  • 1 POST
RECENTLY REPLACED BLOWER RESISTOR AND CHARGED A/C. INITIALLY BLEW COLD, BUT AFTER HEAT WAS TURNED ON, WOULD ONLY BLOW HOT EVEN WITH SYSTEM OFF NO MATTER WHAT VENT SETTING. VENT SETTINGS STILL APPEAR TO BE WORKING, BUT TEMPERATURE SETTING DOES NOT RESPOND AT ALL. SUSPECT VENT SERVO OR VACUUM ISSUE, BUT DON'T KNOW WHERE TO LOOK. A/C SYSTEM STILL CHECKED FULLY CHARGED . WHERE SHOULD I LOOK?
Jun 29, 2008 at 7:07 AM
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BLACKOP555
  • ✓Experienced Mechanic
  • 10,386 POSTS
i soudl suspect the vaccum or the servo motor on the blend door in the vent, it is located under the dash and a pain to get at.

first make sure the heater control valve, if equipped, is functionoing.
Jun 29, 2008 at 12:14 PM
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