A/C evaporator leaking?
My a/c cabin cooling begins to degrad 4 to 5 days after a recharge. The dealer recharged with a UV leak detector after pressure checking but could not immediately detect a leak anywhere. They said to brig it back after a week and they'd recheck but it probably was the evaporator and it'd cost app. &1200 to replace a $140 part due to labor intensity of removing dash, instrument cluster, heating and a/c controls, etc. My UV light only showed the leak detector around the boss at the fill site. I don't know if that's from spill over or the boss is actually cracked all the way around. If the evaporator is leaking wouldn't I see signs of leak detector in the air vents. Anybody got any experience with this phenom?
If you have a leaking evaporator and they charged it with dye you can put a piece of cardboard under the ac vent and let the water drip on to it. If it glows when you shine the light on it then you have a leaking evaporator. Best to do right after it is charged so dye is still in the system.
Thanks John, I got similar advice elsewhere and unfortunately it was glowing green under the uv lite. The dealer worked with me and let me do the dash rip-out to save on labor cost. I should get it back tomorrow good for another 100K.
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