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Old 07-06-2016
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Icon5 A/C issues

My 2009 Ranger 4x2 6Cyl is having issues with temperature control and which vent to activate. It is stuck in the defrost position which was the last position that I moved it to when it was working and the temperature is stuck on outside air. So the setting dial will only turn the air off or on (Coming out of the defrost) and the temp dial does nothing. Currently the dial that controls the amount of air flow is still operating normally. Any suggestions on narrowing down the issue. I would prefer to not throw parts at it hoping that I fix the correct thing. I did open up the glove box and check hoses and all looked good. I did open up the console as well and made sure all of the attachments behind the dials were in place properly... Any tips would be great! Thanks!
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Old 07-06-2016
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Welcome to the forum

It is just 1 issue, your climate control has no Vacuum.
Air direction door, fresh/recirculate door and heat control valve all run from 1 vacuum source
Defrost is default for that door, if no vacuum door moves to defrost, it wasn't anything you did.


If you look at the firewall on passenger side in engine bay, you should see two hard plastic lines coming out, almost look like wires, black and white or grey, these are vacuum lines.

Black one is the Source it "powers" the whole system
White/grey runs to the heat control valve on heater hose
Colors can vary but you get what to look for

The Black one will run to a "ball" on the passenger side toward the front of engine bay, this is a vacuum reservoir.
There will be another line/hose coming out of this "ball", often red, it will run to the intake manifold, the ultimate Source of the vacuum the system uses.

The Black plastic line from firewall to the "ball" often gets hot from exhaust manifold and melts or breaks, so follow it carefully to the "ball", it can be repaired using a rubber vacuum hose.
The "ball" can crack, can't fix that, only replace it
The vacuum line from "ball" to intake manifold can also break or crack, although this usually causes a higher idle.

It could be a problem in the cab vacuum lines, but 99% of the time problem is in the engine bay, so best to start there

Also google: ford ranger defrost only

very common issue on any car/truck

Last edited by RonD; 07-06-2016 at 09:33 PM.
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Old 07-07-2016
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Quote:
Originally Posted by RonD View Post
Welcome to the forum

It is just 1 issue, your climate control has no Vacuum.
Air direction door, fresh/recirculate door and heat control valve all run from 1 vacuum source
Defrost is default for that door, if no vacuum door moves to defrost, it wasn't anything you did.


If you look at the firewall on passenger side in engine bay, you should see two hard plastic lines coming out, almost look like wires, black and white or grey, these are vacuum lines.

Black one is the Source it "powers" the whole system
White/grey runs to the heat control valve on heater hose
Colors can vary but you get what to look for

The Black one will run to a "ball" on the passenger side toward the front of engine bay, this is a vacuum reservoir.
There will be another line/hose coming out of this "ball", often red, it will run to the intake manifold, the ultimate Source of the vacuum the system uses.

The Black plastic line from firewall to the "ball" often gets hot from exhaust manifold and melts or breaks, so follow it carefully to the "ball", it can be repaired using a rubber vacuum hose.
The "ball" can crack, can't fix that, only replace it
The vacuum line from "ball" to intake manifold can also break or crack, although this usually causes a higher idle.

It could be a problem in the cab vacuum lines, but 99% of the time problem is in the engine bay, so best to start there

Also google: ford ranger defrost only

very common issue on any car/truck
It is the line from the "ball" to the vacuum source... though also black instead of red... only about an inch is left at the "ball". We live in the country and it looks like it has been chewed and taken...
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Old 07-07-2016
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On a V6 there should be a vacuum manifold on the upper intake, usually drivers side toward the rear, you will see a few smaller vacuum lines and larger power brake and PCV hose on or near it.

One of those lines, red maybe, will be the hose that goes to the "ball", best thing is to remove each smaller hose, one at a time and blow or suck thru it, broken one will have no resistance, you may be able to hear air coming out where it is broken, and you can extend it from there to the "ball".
See if you can follow it, or just run a new hose from that port to the "ball"

EDIR:
On the 4.0l SOHC engine it looks like the "ball" hose may be on same larger hose connection as EGR, like a dual or triple hook up from one port

Last edited by RonD; 07-07-2016 at 01:24 PM.
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