So a couple weeks ago I got my A/C checked because it wasn't working great and I needed them to check my freon level. They didn't find any leaks, but they told me my compressor is weak and i need a new one, and my expansion valve is stuck halfway open and i need a new one of those. Along with that i'd need an accumulator/drier because i'd have to open the system up which would ruin the accumulator/drier.

 

Anyway, I was looking under my dash a couple days ago, trying to secure my amp's 12V wire a little better, and I noticed a cable was not hooked to anything. I found that it was going to my A/C temperature hot/cold slider thing on the A/C controls.

 

Then I found the spot it hooked to and put it where it went.

 

That does need to be hooked up, so when you put the slider to cold the heater will be fully turned off (it also turns off the water valve under the hood). Otherwise the heater and A/C will fight each other and the heater will win. That may be the only problem you have.

 

yea, i had more to add to my question but the forum is being moody and won't let me post. lol.

 

Is the thing that the cable goes to the expansion valve? Because if it is, then that would explain it being stuck halfway open, and theoretically it would be fine now and I wouldn't need to replace it.

 

 

The cable doesn't go to the expansion valve. The expansion valve operates automatically based on temperature and pressure in the A/C lines. Basically the A/C is either on or off and the temperature slider controls only the heater. When the A/C is on it precools the air from the fan before it has a chance to go to the heater.

The slider cable controls the heater air door and water valve for the heater core.

 

do you think there was a correlation between the cable being not attached and the expansion valve being stuck halfway open?

 

No. They have nothing to do with each other.

It's also hard to tell what the expansion valve is actually doing if you also think the compressor may be bad.

Does the line under the hood get cold?