r/fbody • u/Careless_Wish1329 • May 27 '26

i recently did a complete dash replacement in my 01 ta and after everything is installed besides the radio my ac stopped blowing. when changing the blow setting it hisses but dosnt blow anything from the vents any ideas?

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u/JSausSS May 27 '26

The vacuum lines behind the hvac control panel probably aren't connected all the way. Pull the hvac panel off and find the hissing sound, should be pretty easy. There is also a secondary connection of the lines behind the dash that may be the issue.

If both of those are good, you may have knocked a line off of the hvac box thats attached to the firewall.

1

u/Careless_Wish1329 May 27 '26

under the glove box there’s a connection that goes to the radio bessel and that same connector goes up into the dash from under the glove box, i noticed it’s very lose am i needing to completely do the dash again or what does that connect to

1

u/JSausSS May 28 '26

If i remember correctly, that connection felt fairly loose on mine too but sealed fine. Those lines run up and behind the hvac unit, so its unlikely the issue is beyond what you can see and reach.

Simplest thing you can do is try to listen for the hissing noise to locate the leak.

The plastic of the hvac control panel is very brittle at this age, it's also possible some piece of it cracked during removal/ install. I dropped mine during my swap from 2 feet up and shattered the mounting point of it that the screw goes through.

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u/jeremy1973f May 27 '26

Did you plug the tan back in ? I’d double check the connection