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I have a 2000 Expedition that the AC compresssor quit

Customer Question
I have a 2000...

I have a 2000 Expedition that the AC compresssor quit running last week. All fuses and relays check out ok but there is no power showing to the actual plug in on the compressor

Mechanic's Assistant: Is the power loss consistent, or does it fluctuate?

Total shutdown

Mechanic's Assistant: Are you fixing your Expedition yourself? What have you tried so far?

Self repair..I started up top with checking fuses, relay, power to those junctions in the fuse box. All were good. The plug in however shows no power getting to the compressor

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

That's all I have. Thanks

Submitted: 11 months ago.Category: Ford
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Answered in 7 minutes by:
9/13/2017
Ford Mechanic: Pete, Auto Service Technician replied 11 months ago
Pete
Pete, Auto Service Technician
Category: Ford
Satisfied Customers: 33,303
Experience: Over 17 years diagnosing and repairing automobiles various makes and models with some training and certifications.
Verified

Hi my name is ***** ***** I will be happy to assist with this today.In some cases I may need more info to assist better.I apologize for any delay.

What liter engine is in your model here?

Has anything else been checked like the freon pressure at all?

Let me know so we can continue,thanks Pete

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Customer reply replied 11 months ago
It's has a 4.6 in it. I have checked the high and low pressures and they are good. Also have checked the high pressure plug and it has power there also. The connector to the compressor itself has no power, so wasn't sure if there was a switch that I need to check
Ford Mechanic: Pete, Auto Service Technician replied 11 months ago

I apologize for the delay.

Does your model have the automatic settings for temp control or manual controls?

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Customer reply replied 11 months ago
Manual
Ford Mechanic: Pete, Auto Service Technician replied 11 months ago

In your battery junction box fuse panel does the WOT relay click when you have the engine running and switch on the ac?

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Customer reply replied 11 months ago
I don't hear it clicking. My test light shows power there and I tried a new relay there also.
Ford Mechanic: Pete, Auto Service Technician replied 11 months ago

O.k.,you should have power at 2 terminals at this relay.One will have power at all times key on and off and one power with only the key in the run position or engine running.Do you have both of these powers?

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Customer reply replied 11 months ago
that is correct on both.
Ford Mechanic: Pete, Auto Service Technician replied 11 months ago

O.k.,your engine computer is not energizing the relay then.It will do this when it sees a fault with an ac component or another component on the engine that requires disabling the ac like to much of a load on the engine or a faulty power steering pressure switch.

Have you checked to see if there are any codes set in the engine computer at all?

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Customer reply replied 11 months ago
I have not since my check light hasn't been on.
Customer reply replied 11 months ago
It will be tomorrow before I can do that..
Ford Mechanic: Pete, Auto Service Technician replied 11 months ago

If you can get the codes checked this will help to see if there is a reason the computer is disabling the ac.It can be a fault with an ac cut off switch as well needing replaced.The cut off switch is shown below.You can try to disconnect it and see if the ac works.If it does not try jumping the two wires together and see if the ac works.If it does work then the switch should be replaced.If it does not work at all then I would have the codes checked as this will help to locate the fault.

https://www.dropbox.com/s/0falamjbstsejiu/ac-09-13.gif?dl=0

If more help is needed, use the reply tab to continue our conversation. If no further assistance is needed, kindly rate my service,your 5 star rating is appreciated ( should be a link to click on here or above).You can rate at any time and we can continue to work on your question as this will not close out your question.Keep in mind in some cases it can be difficult to fully diagnose or help repair your vehicle without seeing it and I work on delivering the best possible answer from what I see to work with.

Thanks Pete

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Customer reply replied 11 months ago
I will try that and check codes also and reply tomorrow. Thanks for now
Ford Mechanic: Pete, Auto Service Technician replied 11 months ago

Your welcome

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