1996 Chevy Camaro problem with my heater

1996 CHEVROLET CAMARO
210,000 MILES • V8 • 2WD • AUTOMATIC
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1996 Chevy Camaro 2.8L mileage: 210,000. I have a problem with my heater it will only work in defrost mode When I slide the control to any other setting it stays in defrost.
Nov 9, 2010 at 8:29 PM
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Check for vacuum hoses that may be cracked or a loose connection. Another source of the leak may be the vacuum switch on the back of the heater/air condition control on the dash. Somewhere in the vacuum system is a check valve that may have failed. It is usually part of the vacuum reservoir tank.
Nov 9, 2010 at 8:30 PM
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