my trucks heater works then doesnt and then works again

1997 FORD RANGER
109,000 MILES
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ACEMAY55
  • MEMBER
  • 1 POST
my heater in my truck will blow hot air for about ten minutes and then start blowing cooler air for a long time. then it starts blowing warm air again for awhile and then stops and starts blowing cooler air again
Nov 27, 2011 at 8:15 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check the air blend door/actuator
Nov 27, 2011 at 8:23 PM
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