Engine Size: 5.7
Refrigerant Type: R134a
Ambient Temp: 100
Pressure Low: ?
Pressure High: ?
Country of Origin: United States
Have taken the complete dash out of the truck, including ducting. New evap. blower and actuators later, I'm going to do the re-install. My "safe" place to store things wasn't so leak-proof I discovered. I don't visually see any mold, but it has rained. It has been over a month. I hear tales of mold and I'd rather never have to redo this job again. So, heres my thoughts, let me know what ya'll think. I mix about a 10% bleach/water solution in my flush gun and spray it out and let it air out in this 100 degree summer heat.
Can I get away with that? Bleach is cheap and kills all spores, and the ducting is out of the vehicle. Then I'll add the blower, evap, actuators after the drying out...thanks in advance!, john
A good way to keep mold away is to install a kit that allows the blower to run after the vehicle is shut off. The blower motor will run until the coil has a chance to dry out.
John, That will clean everything up for reassembly and of course it is little risky that the bleach can do some secondary damage. So now you have a clean like new system to reassemble; it does not address or prevent the reoccurrence. Mold will grow in the evaporator case because the environment is perfect for it to do so. There is the blower timer mentioned, that will run the blower longer to dry out condensate and help reduce mold formation. There are chemical treatments such as permanent coil coatings (used by many OE's today), kits to blow chemicals into the evap case, and "bug bomb" devices that use the recirc intake to draw the chemical in.
Don't use bleach. It won't kill most molds anyway. It just turns them a dull white and stinks like bleach. Use Borax. Dissolve about 2-Tbs in a cup of warm water. Brush or spray on. This kills most molds but you'll need to rinse parts. After that, I'd spray another light coat and let it dry.
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