When I turn on AC it blows really hot at first.

Tiny
ANONYMOUS
  • 1998 MAZDA B3000
  • 100,000 MILES

When I turn on ac it blows really hot at first like the heat is on, I checked the vacuum valve on the heater hose its open [no vacuum] the hot water is running though the heater core?. Now its winter and the valve wont shut and blows max heat all the time even when you adjust temp. The only time it closes is when you turn selector switch to off.

Sunday, December 23rd, 2012 AT 2:58 AM

1 Reply

Tiny
KHLOW2008
  • EXPERT
  • 41,974 POSTS

Check the blend door ( item # 13) actuator and its operations. It seems to be stuck in the heater position and not directing air away from the heater.

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Sunday, December 23rd, 2012 AT 4:46 AM

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