It's a brass colored rectangular metal box with tubes attached to it. I'll get a pic when I get a chance.

 

Its a small metal block with 4 lines connected to it that sits above the jack. Cant miss it. I haven't changed mine yet but will do it before winter. Too dang HOT out to do anything.

 

Here you go. The brass box in the middle.

 

Thanks guys!!

 

I have a similar but somewhat opposite problem with a 2004 Ex I bought just two months ago. When I have the A/C on in the front I cannot adjust the temperature for the rear. No matter what I set the rear temperature on (my controls or theirs) it comes out cold if I have the A/C selected. I don't know if this is normal or not. I like to be cooler while the kids in the back want warm air. The only way for me to get heat in the back is turn off the A/C in the front. Any ideas there or am I just out of luck and have to be hot if my kids want warm air?

 

Sounds like the blend door for the rear. it;s on the rear right side,under the plastic thats under the window. easy to get to and easy troubleshoot/replace

 

Thanks I'll try my trouble shooting there!

 

New response to an old thread…

My front AC blows ice cubes and so did the rear as if yesterday.

Now today it just blows warm in the rear. I checked the copper looking block and it felt slightly cold to touch but no tell tale sign of the rear dripping condensation like a leaky sink

I parked the Excursion and let it sit for a couple hours. I restarted it with only the rear AC turned on, front off. The AC compressor was not getting cold or any lines coming off it. Should they be?

Turning the front on again the front lines start condensing and the front only gets cold.

Is there a fuse I need to look at? If so where?

If not what other simple things can I check before doing any major tearing apart?

Cheers in advance for your help!

 

Your rear expansion valve went bad that's why it only blows warm air in the back. You have to vacuum out the freon, change out the valve and fill the system back up or take it in and have someone else do it. I took mine to Ford and they did it.

 

Sounds like a job I will leave to the pros. Any other items they replaced while having the system apart? I hear of some kind of filter on the orifice tube that can get clogged, but I have no idea how they system works. Do you recall about what it cost to have the expansion valve replaced and system recharged?

 

The rear won't turn on the compressor so your system could be working fine. There is only one compressor that goes to front and rear and is controlled by the front controls. So if ac compressor is not on in front it won't be on in rear.

If you had cold in the rear than maybe you just need to check the settings? The front rear setting will control the rear in all settings except the first fan setting. In first fan setting the rear controls will take over.

 

Yes if you have the system opened up you might as well replace as much as possible but that's just me. Orifice tube is cheap and maybe charcoal canister. I don't remember how much it cost because it's been so long ago. I only bought the Ford part because it came with a 2 yr warranty. I try and stay away from Dorman parts.

 

Besides the orifice tube and charcoal canister and of course the expansion valve, what other items should I add to the list?

 

All depends what you want to spend. It can get expensive. If your system is all original and nothing has ever been replaced then I would replace all components under the hood even the compressor. But if your compressor is fairly new then I would replace it. How dirty is your AC condenser? It's really up to you on what you want to spend.

 

little know fact is the rear also has a filter/strainer.

it is located in the small line before the txv valve right before the spring coupler under the body