Thread: http://www.subaruoutback.org/forums...ums/66-problems-maintenance/405457-heater-core-inlet-outlet-identification.html

 

thank you. I see the arrows on the hoses. My concern is that the hoses are reversed on my car. I can't go by the arrows on the hoses because someone could've switched the 2 hoses years ago.

 

Your photo shows the inlet hose (from the engine) at the bottom, and the outlet hose (to the water pump) at the top; same as mine and probably standard in this generation.

But even if reversed, I don't think it would matter for the heater to work. There's no valves or thermostats in the heater plumbing.

Are you dealing with a problem?

 

Yes. I'm not getting heat on the passenger side. It blowing out cold air.

 

The dual climate system uses just one heater core. However, there's a divider inside the heater box, and two "air mix" vanes, one for each side. The two vanes direct air through or around the heater core depending on the temperature setting.

It's possible that the heater core is somewhat clogged on one side, so that even with the vane set to direct all the air through the core, there's little warming of the air. Another possibility, which is not uncommon, is that the actuator (electric motor) that adjusts the air mix vane for the passenger side isn't working, and is stuck at the cold setting.

 

So what if my car has no heat and is overheating. 1.my coolant was low drained it. Then I put full coolant. Same thing the needle was 3/4 of the way from normal. 2. I changed the tstat. Someone said that I can possibly replace or bypass. My forester is 07 with 142k what should I do?