Hey guys, new to this forum . Me and the wife picked up a 2015 Passat TDI a couple years ago, we started having trouble with the heater core and got it fixed. Heat worked good for about two weeks, now the heat has vanished again! Any other area's where I should be poking around? I've always done my own work but the extended warranty covered the heater core fix, can't complain about lol. Anyways I appreciate it.