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It's definitely a debris trap, the drivers side being the first point of buildup, no heat on passenger side would indicate it's near full ( as was mine, now pass is max heat after many flushes ). I think the best is alternate flushing to dislodge a little at a time, it gets tedious though. Best...

I don't see a drain plug, there's one in the engine rad underneath, but the heater core I don't see it, if there was one it would need a strip down to get to it which means you would already have the core out and the debris problem would be easy to sort anyway.

Due to the position of the heater core in the car it will fill with debris which will settle on the drivers side and from the diagram/core design it looks like it will just stay there, the only way really is flushing in reverse then flushing forwards many times, also tapping the unit at the base...

Have you tried my test?

There's no trickery no wizardry, no compartments, no vanes and no blocking chambers it's a Core IN and OUT that's it. All vanes and compartments '' Wizardry'' are external to the core, they direct AIR not Water where selected ( or not in our case ). Honda or any other manufacturer would never...

Have you tried my test?

It would be interesting what you find with my settings, unless you're all fixed now and you get equal heat/airflow. Yes I have bled a few times.

Ok, flushing the heater definitely helped with an increase of heat inside the car, but the drivers side is still not the same heat as passenger side ( if any heat ). Now one thing I have noticed and this would be good if you guys could try too. Set heat to Lo, fan on 5, centre console vents...

Thanks for adding my thread Channel. I'm in the process of doing it now, ( waiting on some antifreeze dohh ), not much in way of particles but some sludge. I don't think operating the car controls will help at all as the matrix is just one chamber and the only valve is on the outside which you...

Interesting read thanks for that, it might just be that the part of the core that gets blocked is the drivers side, still odd though. Anyone know which is in and which is out on the run?, a flush in reverse would perhaps be the best start.

Removed drivers blend motor (which is moving both valve and hot/cold box ), as I thought perhaps the flap for closing hot to cold boxes inside heater was stuck, but alas no, all fine and can hear box and flap engaging when moving by hand. Time I think to move on and just tell passengers it's...

Hi, have searched threads for a fix, did anyone actually solve this problem?. Sat nav model exec, I have all motors working and all vents open close etc, all cables connected. Still can only get heat from passengers side. I have tried the diagnostic for ac but it doesn't seem to work for me...

Took mine in last Friday, all good.

Having repaired my upper hose about 3 years ago which was leaking on the middle gland. I initially thought that this was a repair from a previous owner, why put a gland in the middle of a hose? unless it broke in the middle?. Well from memory after cutting the original hose, this mid section was...