2010vwjetta
Member
The heat on my 2010 TDI Jetta seems to not be blowing as hot as it should be recently. I haven't measured the air coming out yet but with the car fully warmed up after driving for almost an hour the air coming out feels only slightly warm to the hand. The air flow seems fine and cabin air filter was replaced recently. Temperature mixing door seems to be functioning properly as well.
The only things I can think of are a partially clogged heater core (unlikely in my head given the age of the vehicle and coolant) or if they have one the heater hose valve is not opening fully. That leads me to my main question, does the MK5 Jetta even have a valve on the heater hoses to stop the flow of coolant when off of heat? And if so, where is it located? I know it was much more common in older vehicles without air conditioning but I have seen newer cars with them depending on the design of the climate control system. Thanks for any help!
The only things I can think of are a partially clogged heater core (unlikely in my head given the age of the vehicle and coolant) or if they have one the heater hose valve is not opening fully. That leads me to my main question, does the MK5 Jetta even have a valve on the heater hoses to stop the flow of coolant when off of heat? And if so, where is it located? I know it was much more common in older vehicles without air conditioning but I have seen newer cars with them depending on the design of the climate control system. Thanks for any help!