Join Date: Mar 2014
Location: Farm Country near Keyser, West Virginia
Thanked 178 Times in 162 Posts
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I had the same problem on one of my past trucks. I tried to fix it myself to no avail. I ended up going to the dealership who not only cleaned it with a foam that filled the HVAC system, but also put an add on unit on the truck (under warranty) that caused the blower fan to run for 2 minutes after shut down drying up the evaporator. It worked well and I never had a problem after that. I wish I kept the part numbers for the unit but the dealer should know what it is if you elect to go that route.
FWIW, before the repair was finally done, they told me not to use "Max A/C" as that was part of the problem.
2017 F350 CCSB King Ranch Ultimate 6.7
2002 F250 ECLB, XLT, 7.3 PSD, 4X4, Auto, TW 6pos. Tuner, 4" SS Exhaust, Britebox, EZ Down tailgate assist, Rear Air Bags, 6.0 trans cooler, Wicked Wheel 2, Corey's HPX, Dieselsite Water pump w/built-in filter, 203 degree thermostat, Max A/C assist, Oil drain valve, Non EBV pedestal & Flange, S.S. bellowed up pipes, Dieselsite Lifetime Rad. hoses & Intercooler hoses, New oil cooler, CTS Insight monitor,