Where is everyone #5

If the other side looks as good as this side it would make a good project.

 

It is. Interior is all gone though. It's parked on acres we rent...

 

I think i got this a/c problem diagnosed.. What is this part called? Is it the expansion valve ? After trying to put freon in the system . it wouldnt take any.. I tapped on this valve with a screwdriver and it unstuck whatever is in there . started taking freon and compresser kicked in right away. After a couple seconds it shutoff again. I tapped agin with a screwdriver and it kicked back on. Its like its sticking closedand not allowing any flow. The metal piece in center of pic on the firewall with the sensor going into the bottom. is what im talking about

 

That is an expansion valve in your photo.
Not that hard to replace in general. It does look like a fair amount of corrosion has developed on the parts. Probably will need a shop to do the job. It will require recovery of the refrigerant, then change the valve, pull and hold a vacuum of at least 28 inches for 30 minutes to an hour. Then recharge the system. May want to add 4 ounces of a/c system oil during the process. Also might want to consider changing or adding a system dryer as well. The dryer removes moisture and acids. When a high level of moisture is in the system, it can create very corrosive acid and basically eat the system. This acid is a chemical reaction between the refrigerant and water.

 

Lot of good lessons from this guy.

 

Would it make sense that it could be sticking closed and thats whats keeping the compressor from kicking on?

 

Thanks i replied before u edited it and just saw this part . it has a drier system on it but no idea the history on it or when it was last changed.. I guess i will knock this out next time i get to the house. I think my neighbor has a vaccum system for a/c . i appreciate your help

 

Yes, the system has high and low pressure switches or sensors, also temperature sensors. The actual valve has only a spring and diaphragm operating it. If the valve sticks closed, then it would trigger the high pressure sensor to shut off the compressor. Basically it is protecting the system for exploding due to over pressure.

 

Ok that definately makes sense. I just wanted to make sure i didnt just get lucky and still hadnt found the real problem. You know? But it seems to be it. Really appreciate your knowledge and help. A/c is out of my area of expertise

 

Spot on advice. I replaced a lot of evaps when people would try to just fix their cars themselves and charge with the little cans. Doesn't take long before that acid makes a hole (usually in the evap first).

And yes, the valve could be sticking, but there's also a pressure sensor on it that could (possibly more likely?) also be sticking. I'd try the sensor first since they're cheap and it takes less than a minute to do, but if you had air in your system, then changing your desiccant can and pulling it down for a few hours before recharging would also be wise.