A/C Still Leaking water on the passenger floorboard
I found out that the gasket on the inside of the vehicle on the firewall is bad. Tried to put some silicon around it to seal it up but thats not working. water still coming in. Is there anything else I can try? Would I have to take the dash out in order to replace that gasket? Please help
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You need to find the drain pan line that comes through the firewall. Open the hood and search for the line on the passenger side firewall. The line is probably clogged from insects, animals, or other gunk. use a short piece of dowel or wire to unclog the line and allow the pan to drain to the outside of the vehicle.
I had the exact same problem with my 1995 neon. It was leaking around the tail light. I pulled the tail lights off and put a heavy coat of RTV silicone on the gasket, and 2 years later never happened again
There is a drain that goes through the firewall to remove any condesation that the evap core has removed from the air coming into the vehicle. That drain has become plugged. Usually you will see a small rubber elbow sticking out of the firewall on the engine side and usually towards the passenger side. Once you find the drain you can carefully poke around to get the debris moved.
is it only when the ac is on? there is a pan under the ac unit that has a hole in it to allow the condensation to empty. if that hole gets plugged it could cause the condensation to build up and back into the inside of that car. i unplugged mine and floor stayed dry
To be honest, most mechanics hate replacing heater cores because of their location. They are usually on the firewall on the inside of the car underneath the glove box under the dashboard and behind a plastic black cover. If you look under the hood at the firewall on the passenger side, you should see on inlet hose and one outlet hose which should be replaced along with the heater core. They must be removed first before you can remove the heater core. Basically you have to lay on your back on the passenger side Front) floorboard, remove the necessary panels to get to the cover, remove the heater core and install the new one first, then intall the new hoses, reinstall the cover and any panels you removed. Lastly, be sure to bleed and top off the coolant while you run the heater, then check for leaks
You have a bad "heater core". It will leak inside, and outside once the enclosure fills. You need to replace it, or bypass it before your engine overheats and causes a lot more damage. If you're driving the vehicle daily, make sure you check and fill your coolant before you drive it.