General Technical & Electrical General technical and electrical discussion for the Ford Ranger that does not fit in any other sub-forum.

Air Conditioning and heater question

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Old Oct 22, 2008
  #1  
Fordnut's Avatar
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Air Conditioning and heater question

Help!

My 2008 Ranger has A/C and when I use the Max A/C (inside recirculated air), I cannot get any warm air from the vents even when set to the warmest setting. When I use the "normal" A/C (outside air) I can get heated air from the vents, the problem is I don't like the smoggy outside air.

Is there a way to change the blend door setting to get hot air with inside recirculated air?

In my 2000 Mustang I can get hot air with the A/C in Max recirculated mode.
 

Last edited by Fordnut; Oct 22, 2008 at 08:38 PM.
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Old Oct 22, 2008
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ok. I gotta ask. Why would you want hot air out of your A/C?? Use the defroster.
 
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Old Oct 22, 2008
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Welcome to owning an American car.

Sometimes I want to keep the outside air out but I don't want air that's 10 degrees.
 
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Old Oct 22, 2008
  #5  
Fordnut's Avatar
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I want air conditioned air that is warm, not hot humid smelly air from the outside.

Isn't the defroster air coming from outside?
 
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Old Oct 22, 2008
  #6  
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MAX AC: Panel vents with air conditioning, inside air, heater core water valve shut off!!
AC: Panel vents with air conditioning, fresh air.
Panel Only: Fresh air, no AC.
Panel & Floor: Fresh air with AC.
Floor Only: Fresh air, no AC.
Floor & Defrost: Fresh air with AC.
Defrost: Fresh air with AC

The only way to get warm air in MAX AC is to find the hot water shut off and disconnect it. Otherwise, you will never get hot air because there is no hot water. The hot air blend door is not effected by the MAX AC setting.

The only way to manually control the fresh air vs recirc is to find that control behind the dash and re-engineer it.
 
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Old Oct 22, 2008
  #7  
Fordnut's Avatar
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Thanks FireRanger. I will be ordering a Ranger service manual and see how I can do this. I just assumed there was a blend door that switches from inside air to outside air and I could enable or disable the elec or vacuum activation to keep the door in the recirculation mode all the time.
 
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Old Oct 22, 2008
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Assuming that the 08 is the same as prior years...

You should be able to enable the heater in all modes by pulling and plugging the vac line to the hot water valve on the heater hose under the hood. In the absence of vacuum it defaults to open. Should be easy to try and would be just as easy to reverse it if it doesn't work as expected.
 
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Old Oct 26, 2008
  #9  
Fordnut's Avatar
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Excellent advice rwenzing. I'll try it this week. Since it has been getting colder, it's driving me crazy.

Anyone happen to have a photo of the hot water valve and vacuum hoses?

Thanks
 
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Old Oct 27, 2008
  #10  
Rockledge's Avatar
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Here's a close-up shot of the heater control (hot water) valve on my '98:



And here's a relevant prior thread:

https://www.ranger-forums.com/forum2...ad.php?t=52750

.
 
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Old Oct 27, 2008
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My 06 looks different than that. But it's right up on the heater core hoses about 1ft ahead of the firewall.

Rich
 
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