Car Heater System Leak

 The leak from the blower motor, heater core area got to me finally when everything I'd put on the passenger side floor, on my trip back home, got soaked.

Today I took out the glove compartment and pulled back the carpet to find the drain tube.

There was water in the bottom of the blower motor, which is what was producing the gurgling bubbling noise.   And I watched the water spurt from near the drain tube origin at the heater core.

Fortunately the fluid is clear, not tinted red.  In other words, no antifreeze in it, so hopefully no heater core issue.  Just a clogged drain hose, mostly likely.  But also I need to clean out the cowling where the air intake for the HVAC is, to be sure rain can't get in if the vent is clogged in debris.  Rain could actually be causing this too, if air  inside isn't set to recirculate.

Here's a paragraph explaining that:

"Yes, rain can get into the heater/blower system if the external air intake (usually under the windshield cowl) has clogged drains or debris, forcing water up and into the HVAC housing, but modern cars have drains and flaps to direct most rain out, though issues like clogged cowl drains or failed seals can cause leaks, often appearing as wetness on the passenger floorboard. When drawing outside air (not recirculating), the system pulls from the cowl, so if that area floods, water can enter and potentially reach the blower or cabin air filter area, leading to musty smells or actual water leakage."

Here's a video I took of all that water sloshing around where it shouldn't be, inside the heater blower motor.  The  glove compartment is out of the way, and you are looking down into the bottom of the heater blower motor casing.  Second video shows the leak from the heater system, dripping, sometimes spurting off that black round wire wrap, but its actually coming from above and behind that. 

 I pulled off the drain tube from the floorboard, where it goes through, then cleaned it out best I could with a long zip tie back up through towards the heater core,  twisting the zip tie.   Some small rocks came out, then more.   And instantly the water drained from the blower cover bottom and down the tube out onto an already soaked paper towel roll I put under the drain tube.

I put the drain tube down a water bottle for now, left the carpet and pad exposed so I hope they dry out eventually.  But I need to clean out up top too, the cowling just under the windshield.   Until I get that done I'll be sure air is on recirculate.  It's nap time right now.   I didn't poke the drain tube back into the floorboard drain hole because I want to see how much is draining into that bottle and what it looks like because I'm just curious.  I sure hope cleaning that tube out solves the issue.  Tired of everything soaked on the passenger side floor but the gurgling bubbling sound of the water in the blower motor casing didn't really bother me much.