Thread: White dust coming out of my vents?

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Originally Posted by Mike52

Is it anything like this?

Mike

i would of like.. to do that to my sister a time or two

Originally Posted by pat mccarthy

i would of like.. to do that to my sister a time or two

Yeah Pat, I copied that link and sent it to my sister with the message, "How come we didn't have hair dryers when we were kids??

Originally Posted by rspears

Yeah Pat, I copied that link and sent it to my sister with the message, "How come we didn't have hair dryers when we were kids??

I think you answered your own question.

I built the car. It has a Hot Rod Air system in it. I don't see any evidence of a leak anywhere. Would it be inside the evaporator? If so, that's going to be a pain to get to.

Could it possibly be a leak in the AC system. I know I have a leak there because it will only blow cold for a couple weeks at a time. I didn't know if leaking freon could cause a white dust.

Originally Posted by bulldogcountry1

I built the car. It has a Hot Rod Air system in it. I don't see any evidence of a leak anywhere. Would it be inside the evaporator? If so, that's going to be a pain to get to.

Could it possibly be a leak in the AC system. I know I have a leak there because it will only blow cold for a couple weeks at a time. I didn't know if leaking freon could cause a white dust.

Originally Posted by rspears

I think Barb's right here, and you probably have a very small heater core leak, not enough to drip but getting things wet inside the duct. When it dries the chemicals in the anti-freeze and maybe mineral in the water are left behind, and dry to a dusty deposit.

The AC is just freon gas with an initial charge of compressor oil, and freon doesn't leave any type of residue other than frost from the air if discharged quickly. I stand by my previous answer - I think you've got a tiny, pinhole heater core leak. Call Hot Rod Air and ask their tech guys - I bet it won't be the first time they've been asked.

I finally got around to taking out my evaporator core. Surely enough, the evaporator casing has a bunch of the with powder in it. I didn't see an obvious place where there would be a leak, though. When it was first suggested in the post 6 months or so, I put som stop leak in it, but it still blows the flakes out every time I turn the air on.

Is there a way to fix it with solder? What's a good way to find the leak? Water and pressure?

Hot Rod Air doesn't even seem to be in business anymore, as their site doesn't even come up, so I don't even know how I would get a replacement.