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1993 Chevy Beretta how is heater controlled?

Tiny
ESTIQUE
  • MEMBER
  • 1993 CHEVROLET BERETTA
  • 6 CYL
  • 2WD
  • MANUAL
  • 105,000 MILES
Is the heater tempurature controller by a door that controls cold air flow thru the heater, or is it controlled by a valve in the coolant line to heater core? The heater doesn't blow warm air - all hoses to and from heater are hot.
Monday, January 14th, 2008 AT 9:51 AM

4 Replies

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
ON newer cars there is a heater control valve (HCV) inline from the engine cooling system to the intake of the heater core that controls the amount of coolant for a more precise control over the temperature. Then after the heater core is brought to the proper temperature due to the amount of coolant flow when you turn on the heater to full heat the blend door closes off the air ducts and forces the air to flow through the heater core causing the air to be heated, if the door is sticking then the air blows around the heater core and not through it causing the hot heater core hoses but no hot air.
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Monday, January 14th, 2008 AT 8:06 PM
Tiny
ESTIQUE
  • MEMBER
  • 3 POSTS
I thought maybe you could give me some specific info for the 1993 beretta v6. I know that the 1993 cavalier with the v6 does not have a coolant valve for the heater, just the door in the heater to control the heat, I can't find a coolant (liquid) valve inline to the heater core on the beretta-so it must be the same, but I would like to know for sure.
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Monday, January 14th, 2008 AT 10:15 PM
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
No there is no heater control valve, that is why I said newer vehicles, sorry for the confusion.
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Tuesday, January 15th, 2008 AT 7:05 AM
Tiny
ESTIQUE
  • MEMBER
  • 3 POSTS
Thanks for your update. I appreciate the help.
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Wednesday, January 16th, 2008 AT 11:30 AM

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