Water leaking inside RV from furnace.

The furnace is underneath the fridge. We have a residential frig and I don't see any vent on the roof. When I had our TT, we had a absorption fridge that did have a vent. Everything I have read is the vent tube should have a 45 degree angle up so water doesn't get inside the furnace. My tube angels down. This has happened twice now and both times I had a heavy sheeting rain against the side of the motorhome that the furnace is on. The first time I couldn't figure out where it was coming from. This time, I pulled out the bottom drawer that is near the floor next to the fridge. I could see water dripping from the bottom of the furnace near a screw that holds the bottom sheet metal of the furnace. There was no water running on top of the furnace under the fridge. As you can see in the picture above, the vent tube angles down so any water blowing in the vent hole is going to drain into the furnace.

Had the exact same issue. Drove me nuts until i found it .The hinge on the left side of my furnace door was leaking. Make sure that everything is dry in the furnace compartment. Close the door. Run water slow from the top of the door. Not much. I seen water laying in a trough and going in along the left hinge. chalked it and problem solved.

I agree the source of water is likely one of two things

1: the Friges Ice maker .. the line splits and sprays water all over everywhere

2: The Defrost Drip Tube or if you please just Drift Tube

on No-Colds it goes into a "Evaporation Cup" and usually no problem

On Domnetics it is SUPPOSED to be poked trhrough one of the vent holes in the outer cover so it drip-drip-drips on the ground.

A 3rdm related source (Same as last) is the fridge itself. if for some reason the water is NOT going into the drip tray and tube.

Is the refrigerator sitting above the furnace inside? Ours does and we had a leak that was coming in fr om the roof vent for the refrigerator. Water was all over under the furnace. Outside compartment flooded and then water leaked inside and pooled under the furnace.

Now that it stopped raining, I went outside and unscrewed the panel where the vent is. This doesn't look right? Shouldn't the vent pipe be turned the other way so water can't get in? The angle goes down instead of up?!?!?

sounds like it just blue in the outside pipe.