Please someone help me.. Heater or blower noise

[kingfisher73]

Hello all.. There is a sound that is coming out of my blower area.. It's sounds like air escaping... It's driving me crazy and really making the truck a disappointment..
And I love this old girl..
05 SE.. Anyone have any thoughts???
I was thinking blower noise.. But I don't know.. Is a hissing.. If I turn off the blower it's gone.. And otherwise doesn't matter if AC is on or off.. What direction the air is coming from..

Going nutty here....

[smj999smj]

have you tried removing the cabin air filters to make sure they are not clogged?

[labsy]

It sounds to me like A/C gas being low, thus evaporating with hissing sound every now and then. Go get your A/C gas re-filled and recycled, and you will also see how much gas is missing there.
I just did mine yesterday, and it's leaking to a total empty during winter. Did not find any leaks, so we just refilled and we'll see (there was only 20g of gas inside, refilled up to 850g per specifications).

[kingfisher73]

Was urs hissing as well.... I did notice my AC is not great so this possibly can be the issue..

[labsy]

Was urs hissing as well.... I did notice my AC is not great so this possibly can be the issue..

Yes, hissing sound in general means A/C being low on gas, while combined with smell of rotten eggs it means there's some noticeable leak, most probably on cabin radiator.

[dshontell]

I had to remove the fan from the dash ( very easy just tight for a big guy). i found three leaves that probably fell while changing the cabin filter. They were stuck in the fan messing up air flow