Heat coming through floor vent

fourmustangs

fourmustangs

TJ Enthusiast
Joined
Apr 10, 2017
Messages
280
Location
Houston, TX, United States
When running down the highway with the A/C on (Texas) the A/c blows cold thru the vents of where I tell it to, but I get hot air coming out the lower vent at my legs?
If I tell it go to the floor it mixes with the hot air..

I havent find a similar problem posted on the innerweb... or the title not be a match.
 
It may not be in the vents. Check your firewall.. from inside above the pedals. There are rubber grommets that wires and steering shaft pass thru. If you’ve got a lifted Jeep, the steering shaft changes angle and will pop that grommet out. Engine heat comes thru directly to your legs/feet. Feels like floor heat but it’s engine heat coming thru firewall. Other wire/cable grommets may have been punched thru or fallen out over time as well.


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If you were stopped and could feel it blowing out at the vent, then it isn’t the grommet/firewall problem.. sounds like maybe your vent tubes came apart somewhere, and it’s drawing in ambient air temperature.


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I have this issue as well. Looked like all my grommets to the firewall were there though. Like fourmustangs said, putting my hand or feet right near that floor vent I can feel the heat mixing at the vent opening.
 
elmerfudd_web.jpg
a Hunting we will go...lol
 
Living here on Maui we have little use for a heater unless we go all the way up Haleakala. I put a valve outside on my heater line and I keep it shut most of the time, no hot water circulates. I know it likely heats up but at least it's not moving.
 
check the opening for the shifter. The seal on mine is bad and I get hot air that I can feel blowing in near the console area. Also the transmission hump usually gets very hot. I run mine without carpets and my legs feel like they are gonna cook lol.
 
Maybe this will help.. looks like maybe a vacuum actuator or Blend motor/door.. good luck!

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Last edited:
Can’t link from other forums I guess..

Go to “WranglerForum” and search there. Good thread about it.


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JeepNWilly said:
check the opening for the shifter. The seal on mine is bad and I get hot air that I can feel blowing in near the console area. Also the transmission hump usually gets very hot. I run mine without carpets and my legs feel like they are gonna cook lol.
Click to expand...

I do have a cut up inner shift boot/Floor pan cover that certainly does not help the heat coming in to the cabin. I was not able to find the replacement for a 2003 -2006 model. the only ones I see are the older model circular ones like this.

https://www.amazon.com/dp/B01BGJM830/?tag=wranglerorg-20

fourmustangs said:
link doesnt work....but def could be the actuatorView attachment 46168
Click to expand...

The actuator? hmm is this what controls the mix of hot and cold air? I wasn't able to find much in the my FSM.

Actuator.PNG
 
Jericho _Sig said:
It may not be in the vents. Check your firewall.. from inside above the pedals. There are rubber grommets that wires and steering shaft pass thru. If you’ve got a lifted Jeep, the steering shaft changes angle and will pop that grommet out. Engine heat comes thru directly to your legs/feet. Feels like floor heat but it’s engine heat coming thru firewall. Other wire/cable grommets may have been punched thru or fallen out over time as well.


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Click to expand...
i just thought about looking this up and my jeep's grommets around the steering shaft dont stay in place and I can't seem to figure out how they are supposed to stay put, any ideas on what to do? I have no air and it gets pretty hot down in the pedal area.
 
Grease the shaft then use great stuff spray foam in a pinch.
 
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