That makes sense because it's not pumping out water when the engine is running. I only notice it when I come back to the vehicle after its been at rest. And yes I have been using the a/c because it's summer here in Oz. However, I am losing water somewhere as have to keep topping up the radiator...
Thanks it's 1997. Here's a photo from the inside where the hose attaches to the heater and goes through the firewall. I'm in Melbourne, Australia so right-hand drive.
Hey there. Apologies if I'm in the wrong thread! I've got a mysterious heater hose (the brown one in the middle of the picture) that's connected to the bottom of the heater unit and comes out through the firewall, but appears to go nowhere. I found it because there's water leaking from that hose...