2004 expedition evaporator temperature sensor plug location

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Aug 9, 2021 | 02:08 PM

Wjbell1

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2004 expedition evaporator temperature sensor plug location

I am trying to find the location of the plug that connects the evaporator temperature sensor of the AC to the computer. I've heard that you pull the glove compartment down all the way and it's up in there somewhere. I've tried that I can't find the plug to the evaporator temperature sensor if anybody can tell me if it's located somewhere in there or the wires to the evaporative temperature sensor are included with other wires in another plug I'd really appreciate it. I've read that it's two wires going to the plug that look like speaker wire but I can't find it anywhere.

What it is is I'm having a problem with the AC not coming on when it warms up outside. Works great in the morning and in the evening but when the ambient temperature outside gets a little hot the AC clutch stops engaging and I've heard that that's because one of the sensors possibly the evaporator temperature sensor is telling the computer some things wrong and don't turn on the clutch. If anybody has any info on this I really appreciate it and a picture of where it is what even be better. Thanks for reading

Aug 9, 2021 | 07:31 PM

projectSHO89

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From: St Louis

Check your clutch gap, it's probably worn to the point it's excessive and causing the clutch to fail when it's hot.

Your truck is too old to have that sensor.

Aug 9, 2021 | 07:42 PM

Wjbell1

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Quote:

Originally Posted by projectSHO89

Check your clutch gap, it's probably worn to the point it's excessive and causing the clutch to fail when it's hot.

Quote:

Originally Posted by projectSHO89

Your truck is too old to have that sensor.

Thanks for the reply. I should have mentioned it in my original post. But the clutch, compressor and receiver dryer are all brand new. What had happened originally is my clutch went out started smoking so I took it to the shop and they diagnosed it and said your clutch went out and you might as well can replace the compressor and the receiver dryer too so I did. And before my AC system clutch went out it never did this shutting down the AC when it got too hot outside. It always worked perfectly. I've read another threads people pointing to the evaporator temperature sensor as a problem. And there is a mod you can do to it putting in a resistor at the connector to full the computer into thinking the EVAP temp sensor is working normally.

Aug 10, 2021 | 05:08 AM

projectSHO89

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From: St Louis

Yes, you should have provided the history.

1. Just because the compressor is new doesn't mean the gap is correct. Check it.

2. As I already said, your truck is too old to have the evaporator sensor. Stop wasting time looking for something that wasn't installed in your truck.

Aug 10, 2021 | 07:54 AM

Wjbell1

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Quote:

Originally Posted by projectSHO89

Thank you again for replying. I forgot about what you said about the EVAP sensor that's good news.. but the one thing about it is is it in the cab when you press the AC button when it's working you can hear the clutch kick in and clicks. And when it's not working when you press the AC button you do not hear the click. So there is no power going to engage the clutch at all. You can normally hear a definite click and when it doesn't work and produce cold air you cannot hear the click at all. So the clutch isn't even engaging I'll have to double check it to see if it's spinning or not but could that still be the same problem of a bad Gap in the clutch?

Aug 10, 2021 | 04:41 PM

projectSHO89

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From: St Louis

Lack of power to the clutch will cause EXACTLY the same behavior as a gap that is so excessive that the magnetic field cannot pull in the clutch hub. No engagement or operation.

Do not eliminate possibilities based on assumptions. Check it and then decide it that possibility remains or can be eliminated.

If the gap is in the desired range, then the likelihood becomes electrical in nature. Checking a gap is comparatively easy to figuring out why a computer won't turn something on.

Aug 10, 2021 | 04:46 PM

Wjbell1

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Quote:

Originally Posted by projectSHO89

Well that's what I was saying I was thinking there's no power turning the clutch on at the times when you do not hear a click. So how do you check the gap what's it supposed to be? I'm thinking I need to take it back to the shop which I was trying to avoid because then I'm without a vehicle.