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Take your wipers off, remove cowl cover (6 screws) look on passenger side there is a fresh air inlet for the heater. Just past that towards the outer fender is a drain area, see if that is plugged with tree debre. If not open water will back up to the heater air inlet.
Take your wipers off, remove cowl cover (6 screws) look on passenger side there is a fresh air inlet for the heater. Just past that towards the outer fender is a drain area, see if that is plugged with tree debre. If not open water will back up to the heater air inlet.
This^^^ just plugged mine heater inlet with silicone