To me, low pressures on both sides feel like low charge. But knowing it's ES12 in a leaky system, my first thought would be that the propane is mostly gone and you're trying to cool the car on isobutane. You might read some Cathyisms and slowly add propane until the vent temps drop and the low side pressure goes up. http://formicapeak.com/~jimc/cwair.html http://formicapeak.com/~jimc/efair.html Mitch.
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