Not_Agn
Veteran Member
I was thinking the same thing. The heat coming out must be from the electric heater?
I thought the same thing and admit I am confused on this one. During the diagnostic, one of the dealers techs made requests on the door motors, and all responded to the commanded position. It seems to make sense that if the core is plugged, it wouldn't signal the electric auxiliary to shut down, resulting in only drivers side heat. However, then another 'advisory" mentioned the electric axillary should heat both sides when defrosting, yet mine is ice cold on the passenger side and luke warm on the drivers side when the manual controls are set to full defrost (no blend).I don't understand how a bad heater core could cause no heat on one side of the vehicle. I think this is a misdiagnosis.
To me, it sounds like a stuck distribution flap motor that controls heat to the passenger's side. I'll bet you'll see a code with similar wording stored in the HVAC module if you scan with VCDS.
Nope, no codes, and all the tests I could think of pass with VagCom.I don't understand how a bad heater core could cause no heat on one side of the vehicle. I think this is a misdiagnosis.
To me, it sounds like a stuck distribution flap motor that controls heat to the passenger's side. I'll bet you'll see a code with similar wording stored in the HVAC module if you scan with VCDS.
2014 Passat SE TDI 6mtIf you know your build date please post it. TIA
Both mirrors responding to the driver's side function is a setting in the MFI under SETTINGS>CONVENIENCE>MIRRORS. I find it quite handy.My '13 passat se is doing the same thing, tepid heat on the drivers side and no heat on the passenger side even after hours of driving and the engine at normal operating temp. It heated fine last winter.
I am at 34k and will be calling the dealer late next week to get it in for this and one other minor thing (mirror control when on L moves both mirrors not just drivers side) before warranty runs out at 36k.
It will be a couple weeks until i report back as i cant take it in next week because of jury duty.
I had the same thought. If casting junk clogged up the heater core, what did it do yo my radiator and water pump? I am definitely going to press them on this on Tuesday.Ford had a problem with casting material in the 6.0 engine clogging up oil coolers, which in many cases lead to cascading failures of EGR coolers and head gaskets. Something similar could be happening here, but we will need someone to cut open a clogged heater core to know for sure.
If this is the cause of the problem, adding a coolant filtration system will solve the problem by catching the material in the system.
And have someone take a picture this and post it here...If they won't give you the old core, at least get your hands on it and blow through it. You should be able to tell if there is a significant restriction or not.
I'd really like to see what's inside. Is it sludge? Is it sand? Is it a piece of plastic that got sucked in and stuck?And have someone take a picture this and post it here...