Continues heat at window vent.
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.
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