What did the dealer do??

[Fla02LS]

After spending two days to tell me there was a leak in the manifold line, i asked them to just charge it and let me ride. They said they cant charge a system with a leak. Ok. They promised there wasnt any less r134 than when i brought it and suggested i buy a can to recharge myself. It was working off and on before.

I get home now and i cant get the compressor clutch to engage now by jumping the relay. It would three days ago? What could they have done or why can i now not get the clutch to engage? I got a can with gauge to fill on my own but obviously cant charge unless the clutch/compressor is running? WTF dealer.

 

[Robot]

It will not engage if it is empty. I could be wrong but that's the way it used to work.

 

[Fla02LS]

I read an old post from Quik that suggested shorting out the pressure switch. I found it but there are three wires/terminals. Dont know which two to jump?

 

[Fla02LS]

Also to my knowledge jumping the relay contacts is supposed to engage the clutch no matter how low the r134 is. If the compressor has to be running to pull vaccum and charge how else can the compressor be switched on if the car is low?

 

[joegr]

Also to my knowledge jumping the relay contacts is supposed to engage the clutch no matter how low the r134 is. If the compressor has to be running to pull vaccum and charge how else can the compressor be switched on if the car is low?

Yes, bypassing the relay bypasses all compressor cutoffs except for the fuse.

The compressor does not have to run to pull vacuum. Running the compressor with too little refrigerant is a very bad idea. It is a scroll type and will quickly be destroyed. (Normal charging is this: Add oil. Pull vacuum. Add first can of refrigerant. This is bring the system pressure up enough for the compressor to run so that the remaining refrigerant can be added.)

 

[Fla02LS]

Yes, bypassing the relay bypasses all compressor cutoffs except for the fuse.

The compressor does not have to run to pull vacuum. Running the compressor with too little refrigerant is a very bad idea. It is a scroll type and will quickly be destroyed. (Normal charging is this: Add oil. Pull vacuum. Add first can of refrigerant. This is bring the system pressure up enough for the compressor to run so that the remaining refrigerant can be added.)

Ok well i am going to be buying a new manifold line that is leaking as well as new compressor and dryer.

But in the meantime so that i may have some sort of cooling, if the dealer said it is low i shouldnt be in trouble of overfilling, can i not just hook up a can of r134 with gauge to low port and fill? You are saying without clutch engaging or compressor "running" there is still enough vacuum to pull the r134 out of the refill can and fill the system?

Besides that jumping the relay no longer does anything to clutch/compressor? I think thats where i am confused about what is going on. If i pull the fuse i can hear the dccv solenoid click, so i assume the fuse is good. Definately loooks good.

 

[joegr]

Ok well i am going to be buying a new manifold line that is leaking as well as new compressor and dryer.

But in the meantime so that i may have some sort of cooling, if the dealer said it is low i shouldnt be in trouble of overfilling, can i not just hook up a can of r134 with gauge to low port and fill? You are saying without clutch engaging or compressor "running" there is still enough vacuum to pull the r134 out of the refill can and fill the system?

Besides that jumping the relay no longer does anything to clutch/compressor? I think thats where i am confused about what is going on. If i pull the fuse i can hear the dccv solenoid click, so i assume the fuse is good. Definately loooks good.

I'm still thinking that your clutch is bad. You don't need any vacuum or to "pull" the refrigerant out of the can. Those cans are pressurized to well over 30 PSI.

 

[Fla02LS]

I'm still thinking that your clutch is bad. You don't need any vacuum or to "pull" the refrigerant out of the can. Those cans are pressurized to well over 30 PSI.

I think i'll get one of the little cans of pag oil then to add before doing the R134. See if it even makes it out of the can into the compressor. Usually the outside of the refill cans get cold when its filling. The one i had did not which made me think nothing is getting from can to system.

 

[manoli]

The Lincoln dealer where I live wanted to replace the a/c manifold line on my LS and so i told them about the schrader valve on the a/c line, replaced it and everything has been back to normal.