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sprinkles08, ASE Certified Technician
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Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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Saab 95: air cond. condensation is coming out of vent under

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air cond. condensation is coming out of vent under front passenger seat. is the line pluged?

Hello and welcome to JustAnswer!


If you have water coming out of a vent from the heater box then it is almost surely a plugged heater box drain tube. The heater box has a drain tube which comes through the right side of the firewall to let out condensation that forms and drips off the evaporator. If the tube is plugged with debris then it will cause the heater box to fill with water until it reaches the lowest point where it can leak, which in your case is the vent.

sprinkles08 and 2 other Car Specialists are ready to help you
Customer: replied 3 years ago.

where is the condensation line drain tube located ?

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