1999 ranger air flow control flapper - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 03-22-2010
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Icon5 1999 ranger air flow control flapper

I have no control over flow of heater/AC air distribution. I understand this is a common problem in the old rangers. Some valuce shaft must be broken. The motor that controls the flapper valve moves. Any ideas.
Lyle
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Old 03-22-2010
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If your air comes out of the defroster its vacuum leak. If you have no control over temperature then its the blend door.

Dash is the same from 95 to a new truck on the lot. Not sure what an older ranger means to you.
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Old 03-22-2010
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I have no control over the temperature so as I suspected its the blend door. Its a 1999 ranger.
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Old 03-22-2010
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option 1 is to pull the dash and replace the heater box.

option 2 is cheaper maybe easier.
Free Ford Blend Door Fix
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Old 03-23-2010
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Here's another approach - replacing the blend door without pulling the dash. I haven't tried this myself but it looks promising.
Quick and Easy Blend Door Replacement Tutorial
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Old 03-23-2010
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BLEND DOOR

Thanks, I'll give option 2 a try.
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Old 03-23-2010
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Quote:
Originally Posted by lstaufer View Post
Thanks, I'll give option 2 a try.
Yes, that can be the cheapest/easiest and it often works. If not, then it's blend door replacement time.
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Old 12-08-2010
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how do u fix it if it was a vacuum leak? my blows out defrost after a certain rpm or a certain vacum is pulled while accelerating. but once ive stoped it goes back to where ever the control is set to. how do i fix it?

sorry to jack an old thread i was doing a search and found this thread
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Old 12-08-2010
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Sounds like you have an issue with the vacuum reservoir. Its in the passenger side front wheel well. Probably has a small hole in it.

To chase a leak you will need a hand held vacuum pump and follow the lines testing each one.
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  #10  
Old 12-13-2010
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96 Ranger heater temp issue - when the truck is moving the heat works good ( temp contol on hot ), when i am at a stoplight for longer than a minute the air from the vents starts getting cool until the truck starts moving again when the vent air starts blowing hot again. If idling first thing in the morning ( for at least 10 minutes ) the vent air is cool until i start driving down the road when the vent air gets hot like normal. I already replaced the "heater valve box " inline with the heater core hoses. (the heater temp is of course at the HOT setting always) . Any ideas ?
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  #11  
Old 12-14-2010
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If you are stopped and rev the engine does the heat come back?

This is a different issue then the blend door.
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