Thread: Right hand aircon vent not as cold.

Originally Posted by patclan

Yeah I think they are the wrong way, unless there has been change of design, would you not be passing hot coolant into the heater core constantly with them that way, except you have a tap now.
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I hope not. They said its a one way flow. You've got me worried now.

Just to add to this thread, I recommend you also consider the position of the hoses carrying hot coolant to the heater valve and returning to the radiator.
I found two hoses were pressed hard up against the plastic ventilation piping. As the coolant heated to about 100 degrees, heat would have soaked through the plastic and warmed the air in the ventilation piping.
I found with the air-con off the vents were blowing warm air after about 10 mins of driving. With the air-con on, the air still warmed, but not as much.
My air-con has been serviced, and blows really cold on startup, and my heater valve has been replaced, so I'm confident neither is to blame.
So, as explained in my Member's Rides thread, I've been experimenting with insulation on a return Brisbane-Sydney trip this week.
First I stuck silver heat insulation from Autobarn on the outside of the ventilation piping to protect it from the heat from the coolant pipe. This made a significant difference.
Then I stuck two pieces of CarBuilders waterproof insulation over the silver heat insulation, to further separate the hot hoses from the ventilation piping.
This means that the coolant hoses are now separated from the ventilation piping by two layers of insulation plus one layer of heat insulation. I spent some time lying underneath pulling the insulation right down over the lower section of the ventilation piping.
This has had the added benefit of blocking the gap in the ventilation piping where the two plastic sections do not come together properly, I hope.
The pics below show it looks a bodgy job, but I don't care if it works.
So, if anyone else has this problem, I recommend you investigate using insulation to separate the two heater hoses from touching the ventilation piping. It can only help.
Hope that information is helpful.