C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

A/C fan/blower question

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Old Jun 21, 2025 | 06:04 PM
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Default A/C fan/blower question

Hi guys!

Maybe someone has already addressed this but I couldn't find anything. Has anyone tried to do anything to improve air flow inside the car? I have '96 LT4 and the a/c blows cold but the amount of air blowing is pretty weak. It's really hot in Denver right now and with a tinted top its really tough to get it cool inside the car. It just doesn't come out of the vents very hard or hard enough to really cool the inside the car when its super hot outside. Is there a stronger blower motor to move more air or, any tricks? My everyday truck will freeze me out if I want it to. It would be great to get more pop out of it... Thanks in advance for any suggestions.
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Old Jun 21, 2025 | 06:55 PM
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The problem maybe a clogged up AC evaporator inside the heater box, unlike most newer cars that have some sort of cabin filter C4s don't so the Evaporator can get pretty clogged up, the fix/cleaning.
Available at Lowe's home Depot there's AC condenser/evaporator spray, the down side of the Lowe's/ Home Depot is you need to pull the resistor block and shoot it in though the hole and I recommend pulling the fan and reaching in and spraying directly on things and maybe a lite soft brush. same thing is available on Amazon, but it's for automotive use and it comes with a 3' hose. You climb under the car find the AC condensation drain insert the hose and follow instructions and I still recommend a hand's on of seeing the AC so you can get 30 years of filth out of the fins and compartment




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Old Sep 11, 2025 | 06:04 PM
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Originally Posted by POPLT4
Hi guys!

Maybe someone has already addressed this but I couldn't find anything. Has anyone tried to do anything to improve air flow inside the car? I have '96 LT4 and the a/c blows cold but the amount of air blowing is pretty weak. It's really hot in Denver right now and with a tinted top its really tough to get it cool inside the car. It just doesn't come out of the vents very hard or hard enough to really cool the inside the car when its super hot outside. Is there a stronger blower motor to move more air or, any tricks? My everyday truck will freeze me out if I want it to. It would be great to get more pop out of it... Thanks in advance for any suggestions.
Found a solution? facing the same issues with my 95 and it sucks here in Florida
I put a new blower motor in, my evaporator core wasn't that dirty or gunked up (I cleaned out a little bit of leaves, and used the foam cleaner as well), same with the condenser
I still feel the air flow is weak.. maybe I got a bad, new motor?

I'm going to change the capacitors on the AC control unit and serial connector box, due to some weird issues sometimes (It'll show 2 dashes, then I press the passenger seat controls and it fixes itself? ) but I don't think that's affecting the air flow at max speed
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