Hi everyone, newer member and newish Volvo owner here. Hoping someone will be able to help me out with diagnosing and fixing my 2005 volvo s40 with 195k. Just recently we realized the floor was soaked, coolant checked and low, refilled and same result, most of it ended up on the floor, the entire floor, all sides and in the back too. It is not a roof leak. On top of that the leaks seem to be causing the wipers to short because they'll randomly turn on to the highest setting once the coolant gets flowing and they wont turn off until the battery is disconnected or shut of the car and the coolant stops flowing. So thinking it'd be an easy diagnosis we began to take apart what was needed to get to the heater core and it doesnt seem to be the unit itself and maybe a bad O ring or attachment because the can see the mositure occurring within an electrical conduit on the passenger side floor next to the exposed heater core. Whelp, any help is appreciated....hopefully someone on here has dealt with a similar issur and it wasn't as big an issue and cost as im suspecting. Any help is greatly appreciated and glad to be part of this wonderful community of Volvo owners!