AC and Expansion Valve woes
Based on your description I suspect the expansion valve has failed completely, doubt it is plugged, however both would be extremely rare. If it is plugged wholly or partially you could try a reverse flush. Disconnect the lines and attempt a high pressure gas reverse flush. Might not work but sounds like your system already does not work.
1st Gear
Joined: Nov 2024
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You cannot get to the expansion valve from the engine side. You need to remove the HVAC box and disassemble it to get at the expansion valve. It lives in here:
and is against the evaporator here, shown in the lower right:
As a follow up to the initial story, I ended up getting a can of R134A recharge from the local autoparts store, the kind with the trigger and the gauge on top, and over the last 4 years have slowly kept recharging the system. I don't remember the particulars but I'm now halfway through the second can, and each time the charge seems to last longer than the time before. Perhaps it's lubing the seals, or the magical sealant in the can is working progressively.
and is against the evaporator here, shown in the lower right:
As a follow up to the initial story, I ended up getting a can of R134A recharge from the local autoparts store, the kind with the trigger and the gauge on top, and over the last 4 years have slowly kept recharging the system. I don't remember the particulars but I'm now halfway through the second can, and each time the charge seems to last longer than the time before. Perhaps it's lubing the seals, or the magical sealant in the can is working progressively.
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Pro Wrench
Joined: Apr 2018
Posts: 1,516
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From: SE PA
Well, I'm not sure what happened to my pics but they were screen grabs from the RAVE. Someone edited my post to remove the links because the pics are still on my server, yet my post has no html code to point to them anymore. Perhaps is was a copyright problem? Dunno. In any event, there are some illustrations in the RAVE that will give you more info about the expansion valve.
Weird.
Weird.
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