[Beumers]

Hi all.
After a long frustrated pauze, I again try to figure out what's wrong with the IHKA in my '86-E32. 735i.
Problem: Full heat on the driverside at the windshield vent under all conditions.
Only when the middle wheel is on Zero( everything off) there is no heat.

I followed some guides from the forum.

At the watervalves on pin 1 there's 12-V. when on cold and 0-V when on hot. Ign on.
When inbetween hot&cold on pin2 Y/BR/PRP there is continue zero. No puls. Control light full power
On pin3 Y/BR there is nothing at all.

The watervalves are not in great condition but when tested I can hear them click.

When I put a clamb on the intake water hoose to the watervalves the heat is a little bit less but it's still very noticable there. This puzzles me because it should prevent hot water from getting into the system.

I don't know if it makes sence to some of you. Pin 1/2/3 are not correct. But is it a problem in the unit on the center dash or in the control unit behind the so called sword. The one with the 4 collored conectors.

I tested a spare unit on the dash but that had no 12V on pin one so I had to asume it's broke.

Regards Henk Beumers.