Cold air (not warm) coming through the vents when the heater is on. Coolant leakage visible inside the cabin or a damp smell. Can a blown fuse cause heater not to work? Yes modern cars have switch that controls the water flow to the vents inside the car. Blown fuse will prevent it from opening and will cause a car heater not to work.
I am having the same issue!! Drivers seat heater clicks off as well seat adjustment stops working. I drive a 2007 335i Sedan, built 9/2006. I asked the parts guy at my local BMW dealership and he told me he was not familiar with this issue.
iTrader: ( 0) Replacing the Radiator/Heater Core Already? Hi folks, Recently picked up a CPO 2015 328i GT xDrive (~17,500 mi) about a month ago and when it started getting a little colder here in CT (last week), noticed that the heat on the passenger side was never really hot, in fact even when set to 84F the highest setting it was usually cold.

I have a 2007 BMW 335i, and everything works amazingly except the heat. The AC blows cold on even the hottest days, but I cannot get the heat to blow from the vents. I have tried everything. I drove back from Orlando, FL last night up to north Florida, and the outside temperature dropped to about 32 degrees. I had the internal temperature set

Thoroughly clean the glass round the break, taking care not to damage the element further. Stick down some masking tape along each side of the broken element, along the length you intend to repair. Apply a coat of conducting paint to the break. Leave it to dry for 20 minute, then apply a second coat. Remove the masking tape.
6701 posts · Joined 2010. #2 · May 19, 2014 (Edited) Did you try turning the fan up. Did you try turning the fan up. The heat controller comes up powered down after. a battery disconnect . Also if you ever want to turn the controller. all the way off keep turning the fan down till the controller turns off.
The blower is fine & air is moving, just not cold. If at a stop, I notice the RPM would bounce from 500/600 to 900/1000 & drop back down very 5 secs. If I turn the AC off, after it stops working, the RPM stops bouncing. While the AC is functioning & on, I have no issues.
68. Plug-extra wire to heater wire 69. Plug-heater wire to fuel pump wire 70. Connection for heater 71. Ballast resistor in heater 72. Thermoswitch (parked car heater) 73. Heater motor 74. Overheating switch (parked car heater) 75. Heater plug for parked car heater 76. Heater 77. Fuel pump 78. Plug - on-board computer to remote control 79.
Cables would bind and stick, causing all kinds of problems. So manufacturers switched to small electric motors called actuator to vary the blend/air mix door positions. Drivers changed air temperature far more often than they change the mode (defrost, floor heat, dash vents, etc.), so the temperature actuators generally fail first.
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