Hi,
I have a 92 Civic Lx that has a high pressure problem when i try to recharge the A/C. I was told it is probably the expansion valve that needs replaced. Does anybody know the location and the best way to get to it. From what i can tell I am thinking it is in the heater box.

thanks
Jason

 

The evaporator is behind the glove box. Also check whether your diagnosis is consistent with information in the pressure chart.

 

Condenser fan failure, air in the system, and overcharging are much more common causes of excessive high side pressure. Rule those out first. If the low side is in vacuum when properly charged (by weight), there is a blockage which is usually the expansion valve.

You have to remove the evaporator case from the car to change the valve. Remove the glove box and reinforcing bar behind (technically in front of) the glove box. Recover the refrigerant and disconnect the lines under the hood. Unbolt the evaporator case and pull it out.

Note carefully the capilary tube instructions. This tube must be properly attached to the line exactly as shown and insulated with the foam tape for correct performance of the new valve.

 

Here is an exploded view of your A/C system the expansion valve is #13
80220-SR1-A11VALVE ASSY., EXPANSION$52.30



[img]local://upfiles/29925/88499B1291C7425790CBF023822DABB4.jpg[/img]

 

I feel for you, hemicharger. it's getting hot here as well. but i am more inclined to agree with mk378 that the problem might be elsewhere. maybe i'm not too familiar with a/c systems, but i would think other parts will fail first b/4 the expansion valve. if it is clogged, then there is a bigger problem. why would it clog inside a supposed closed system?