A/C System will not accept additional Freon??? - Mercedes Benz SLK Forum

SLK R170 General Discussion SLK 200, SLK 230K, SLK 320, SLK32 AMG

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#1 Old 3 Weeks Ago
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A/C System will not accept additional Freon???

OK! Here's the situation. I've been messing with the A/C system for a couple of days. I've searched all over for what I believe to be a typical problem concerning these cars and that's recharging the system.

According to the gauge on the Freon recharge bottle I purchased at Autozone, the system is slightly below full. I say only slightly because the compressor kicks on after i cycle the EC button. The first time I tried filling the system, the needle on the gauge didn't move. I sat there for a good 10 minutes waiting for something to happen: nothing (although there was a wave-like movement in the needle)!

Did a search and discovered the Duo-valve! Used the cleaning process that was linked to the tread. I also used a multi-meter to check the varying voltage between heat and A/C-that worked as well. Heck, I could even hear those duo valves clicking in movement, so those were good.

Now with all of that completed, she's still not creating cold air-only slightly cooler than ambient. I'm wondering if my issue is as simple as a possibly broken recharge gauge/bottle or is there another item on the HVAC system I need to consider? Thanks for your help!
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#2 Old 2 Weeks Ago
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I bet you ran in to the same problem I just did. The new cans have a valve inside the top and you need an adapter to get the old style fillers to work. Go get your adapter for $3. No idea why they don't tell you when you buy it.
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#3 Old 2 Weeks Ago
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Originally Posted by jet_fl View Post
I bet you ran in to the same problem I just did. The new cans have a valve inside the top and you need an adapter to get the old style fillers to work. Go get your adapter for $3. No idea why they don't tell you when you buy it.
OH, I SOOO hope you're right. Just called Action Gator Tire and they want 120 for vacuum, check and recharge-not a bad price, but I can put that into the resto job. Thx Jet_fl!
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#4 Old 2 Weeks Ago
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OH, I SOOO hope you're right. Just called Action Gator Tire and they want 120 for vacuum, check and recharge-not a bad price, but I can put that into the resto job. Thx Jet_fl!
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#5 Old 2 Weeks Ago
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He will be at the Nov 2nd meet!
Sorry-most likely will be in Vegas then.
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