Car heater acting really weird

mini
coopers

#1

Car heater acting really weird. I already know my heater core is plugged so this is really just more of a curiosity thing but the driver side vents blow Luke warm air on low but the passenger side vents blow cold. What would cause this?


#2

A plugged heater core. :stuck_out_tongue_winking_eye:


#3

Another possibility is one or more of the vent doors that direct the path of the hvac air flow are not working. On newer cars those are often small electro-mechanical actuators, servos, and who’s failures – not just in minis but many makes of cars – are a frequent source of complaints here. I wouldn’t make sense to presume that’s the problem of course until the heater core is working.


#4

Right. It was just a curiosity question mostly. Usually I though when a heater core went out it affected all of the air flow and not just one side lol


#5

why wont you change the heater core if it is plugged? maybe the tech could look at the blend doors at the same time


#6

Sometimes a blocked heater core can be reversed flushed and get it working again. A diyer could figure out a way to hook up a garden hose so the flow – accessed at the firewall – ran through the heater core backward. Could be a big, drenching, messy job though, especially if done in the dead of winter…


#7

I’m going to. Just don’t have the money right now. Dealers want way too much to do it and haven’t found anyone else yet who will do it