Funny smell when air turned on

[happymachinist]

So when I turn on my ac for a minute or two the air coming out of my vents smells like "dust" we'll say. It seems to be more prevalent with the ac than heat.

I'm imaging I need to do a little disassembling and cleaning. Could it be the coil or vents themselves?

Thanks

 

[poncho62]

What year truck?,,,Newer ones have a cabin filter

 

[happymachinist]

97...I wasnt aware trucks this old had a cabin air filter

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[poncho62]

97 doesnt.......Your fan motor is easy to take out, perhaps you can see if any dirt is built up in there

 

[bow61509]

You can take the blower motor out and clean behind it, I think it's the evaporator? Anyway there's a radiator type deal behind the blower, I used some AC coil cleaner stuff and a water hose on my 96. You will be very surprised how much junk you will get out of there.

Sent from the big block!

 

[JollyGreen]

Just as Dean said the evap core probably has a bunch of crap in it. There's a write up on here about cleaning it.

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[skylark]

Nitrous oxide? It always smells funny to me.

 

[happymachinist]

What you're all saying makes sense to me. I'll look for the write up on cleaning the evap core...I dont think its nitrous oxide but I'll do a little looking to double check

Thanks

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[skylark]

I dont think its nitrous oxide but I'll do a little looking to double check

Just havin a little fun.