AC Low pressure 100 psi, not cooling.
04-19-2019, 09:56 PM
#1
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GL450
AC Low pressure 100 psi, not cooling.
2008 GL450. Some history, it was parked for about a year and the AC was working before I stopped driving it. All I’ve done since beginning to drive it again is change the main and aux batteries and suspension. All indications points to the compressor not coming on since the pressure on the low side is almost 100psi @ 70 degrees ambient. Is it safe to assume it’s not a recharging issue?
I’ve read that some models require some kind of AC reset after both batteries are removed and wondering if that’s a requirement with this model. Guess I’m looking for some pointers on how to narrow the list of potentials given the history (worked fine before parking it), before I splurge on a new compressor. Thx.
I’ve read that some models require some kind of AC reset after both batteries are removed and wondering if that’s a requirement with this model. Guess I’m looking for some pointers on how to narrow the list of potentials given the history (worked fine before parking it), before I splurge on a new compressor. Thx.
04-29-2019, 04:32 AM
#3
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2020 E 300 Coupe and 2019 GLS 400
100psi seems high, very high. Perhaps the compressor shutdown for protection. Seen many garages that over fill and this puts the AC into protection mode. The only correct way is to measure both the low and high sides, and fill by weight per Mercedes instructions.
