Before I get into the problem, I'd like to say that this is a great website for lots of information on the truck I love!

Now on to the problem...

I own a 2000 Ford Ranger, 3.0L engine, 5 speed manual.

I turned the AC on the other day, and to my suprise, no cold air. I've got a couple of things to check, and wanted some feedback as to whether I'm looking at the right things or not.

1) Check the pressure level of the coolant
2) Check the WOT relay
3) Check for leaks
4) Check clutch

I haven't had a chance to check the pressure yet, but will be shortly. What I have checked is the clutch. It absolutely does not move when the AC is on. I'm wondering if the clutch has gone bad.

I have tried to check the WOT relay, but I honestly have no idea on how to check it. When I get a chance I am planning on calling my local Ford dealership to see if they can tell me how.

Can anyone tell me how to check a relay, let alone the WOT relay?
If the pressure is low, could that be why the clutch refuses to engage and disengage?

On a side note, is it possible to pull a code with an OBD II scanner when the check engine light is off? I think you can, but my friend disagrees.

Thanks for all the help!!!

 

Welcome to FTE!!

Check to see if you have power at the clutch when you turn it on, if not check at the pressure switch.

You can have continuous codes that are stored but if the problem doesn't occur the CEL will go off, I don't recall the exact number of drive cylces required to turn the light off or to clear the continuous code.

 

Thanks for the help, I'll give it a shot!

 

Just bumping this post for any additional suggestions.

Thanks again!

 

The answer is yes. As was noted, check for voltage at the clutch and the pressure switch; this is your starting point. You could also hook up a gauge and see if there is any pressure there; it's also quick and easy. By doing these things, you will determine if you have an electrical problem or if you've lost the charge.

 

I bought a gauge and checked the pressure.

From what I can tell, something electrical/mechanical has failed in the truck. Pressure reads where it should.

When I get a chance, I'll check the voltage and pressure switch.

 

i have a 98 ranger w/ a 2.5L and when i give it gas the air stops blowing. Why?

 

That sounds like the WOT relay could be the problem. It's in your power distribution box, but I have no idea on how to check them, other then putting voltage on the leads and seeing if it switches over like it should.

 

Where is the pressure switch located on a 2000 ford ranger?

 

bumping the thread...

 

my 99 does the same thing and what actually happens with mine , and its only when on the strongest setting for the blower the vaccum is bad and it starts coming out the defroster once she kicks back up into cruising ear it blows just fine. Im told somewhere under the dash is a bad check valve im just too lazy to check it out

 

that is exactly what mine does. If you figure out ho wto fix it please let me know.

 

If it goes to defrost under heavy acceleration you have a vacuum leak. Get a vacuum pump/gauge and test the system from the source at the engine. I bet you'll find the leak at the reservoir or the hubs on a 4x4 unless someone has been playing around under the dash.