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Discussion Starter · #1 ·
Hi guys


Here is my problem The AC doesnt work it only blows out hot air but if you turn up the heat it gets hotter. The A/C clutch is not engaging either.

I have checked the fuse in the right corner third down from the top under the dash.

I see that their is a relay and a diode under the hood. Do these go bad? How can you test if they are good or bad?

I need help quick because I am in Sacramento and the return trip is going to be hotter then hell:lame:

Thanks,
Andrew
 

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Drink til she's cute
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This is gonna get good!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 

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Here is my problem The AC doesnt work it only blows out hot air but if you turn up the heat it gets hotter. The A/C clutch is not engaging either.
That's normal. Except for the clutch not engaging part.

I have checked the fuse in the right corner third down from the top under the dash.
This sounds like the correct fuse to check (#24 - 10 amp). Check it again or just replace it.


I see that their is a relay and a diode under the hood. Do these go bad? How can you test if they are good or bad?
Yes, they can go bad, all the relays in the power management (under hood) are the same, you can try swapping them around if you want to.
I wouldn't, because relay #31 and fuse #23 only controls the blower motor, so if the blower motor is blowing air the relay/fuse is good.

The diodes are the same, you could swap those around too.
I wouldn't because #36 is for the A/C clutch, #37 is for the PCM.
So if the a/c diode was bad and you swapped them the truck probably wouldn't start or run.
Ive never had one go bad nor have I heard of one going bad, not saying they cant though.

I need help quick because I am in Sacramento and the return trip is going to be hotter then hell

Make sure the wires are plugged into the fan clutch and are not burned or shorted.

Use the 2-55 a/c on the way home, take it back to who repaired it last time ask them to do it right...R
 

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I suspect you were running the AC lean and burnt a piston in the compressor :smirk:

Try some radiator stop leak and put a block of ice in the glovebox, worked for me once.
 

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Drink til she's cute
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It's about damn time!!!!!!!!!!!!!!!!!!!!!!
 

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I suspect you were running the AC lean and burnt a piston in the compressor :smirk:

Try some radiator stop leak and put a block of ice in the glovebox, worked for me once.

Maybe try hooking up a set of gauges to the system and see whats going on instead of guessing.

System takes exactly 2.5lbs of R134A

This job takes a professional with proper tooling LOL:rockwoot:

GREGROBBER,

you so increadibly wrong on running the system "lean" and breaking the pump......there is this sensor thingy that protects the pump thingy from compressing when the low side gets below about 25psi
 

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Andrew, you just finished Carnage 2, 3, or 4 where ya just had your AC service at a shop - what the hell, recharged - and ya broke it again!! What are ya doin, sniffing that freon??!! :poke:
 

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Discussion Starter · #11 ·
I dont have gauges to check the system. I will have to take it to the dealer again. This blows:lame:

I will check the wires to see if they are bad. It just stopped working aint my fault.

Can you test a relay to see if it is bad?
 

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Sure you can here ya go, relay testing for dummies.
http://www1.autozone.com/servlet/UiBroker?ForwardPage=az/cds/en_us/0900823d/80/04/d0/45/0900823d8004d045.jsp

Of course you could've typed in "how to check a relay" and gotten the same result. :D

I don't know why you'd want to, again, none of the relays in your truck have anything to do with the A/C clutch. ...R


Are you stoned or just flat eat all the way up with the dumb ass.:poke:

Rustler,

wanna compete to see who can be the biggest dick head LOL

:swordfight::swordfight::swordfight:

You can have your swords :gun:
 

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Discussion Starter · #14 ·
Sure you can here ya go, relay testing for dummies.
http://www1.autozone.com/servlet/UiBroker?ForwardPage=az/cds/en_us/0900823d/80/04/d0/45/0900823d8004d045.jsp

Of course you could've typed in "how to check a relay" and gotten the same result. :D

I don't know why you'd want to, again, none of the relays in your truck have anything to do with the A/C clutch. ...R


Are you stoned or just flat eat all the way up with the dumb ass.:poke:
According to the Ford manual their is a relay under the hood #36 that is for the A/C clutch. Part #FOAB 14B192-AA

I googled "How to Check relay" and a few other searches and only got relay information from Bosch and and for Volkswagens

-
Andrew
 

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Unless the power distribution box is different on a F550, #36 under hood is a diode not a relay.

If somehow I didn't make it simple enough for you to comprehend in my first response I'll try again.
Under hood #36 and #37 are the same thing.
Swap them, start truck, turn on A/C, if it still doesn't work the diode is not your problem.
If the truck wont start, swap them back to their original position and get another one...R
 

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Please stop working on your truck Andrew. Mechanical stuff is just not for you. There is a quote from gone in 60 seconds that goes something like this....."I can't swim, I know I can't swin. So you know what I do? I keep my black ass out the pool."
 

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Mine quit working once. There was power to the clutch, but it wouldn't engage. There are a few shims behind the compressor clutch plate that sets the air gap. After 165,000 miles my clutch plate had worn to the point that the clutch wouldn't engage. I pulled the 8mm bolt in the center of the clutch and removed a shim, put it back together, and wow... cold air. I've seen this on 3 trucks, so far. Of course, I'd check to see if there is power to the compressor first, and I'm not talking about the belt. I kinda know what I'm doing in that regard.
 
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