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International Automotive Technicians Network
Re: How often can you not find a leak?
Posted to HVAC Forum on 6/18/2020

on the older MBs , where you could see the evaporator / heater case , used to drill a small hole in the plastic housing and stick the probe in there , with a/c off , the evaporator would be pressurized .no running fan .the leak if any would show .plug hole aft... Login to read more.