Quote:
Originally Posted by LightlyToasted
After disassembling and reassembling the heater control valve, both valves are now open. One of the coils had coolant on it, so perhaps some coolant slipped by a seal and either gummed things up or caused the electronics to fail.
I'm going to replace the valve.
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Hope it solves the problem. My e70 was also very flakey and I went through most of what you did including changing the valve and tried replacing a few solenoids. Eventually had to replace the IHKA even though it had no codes with a used one and code it. I think my old IHKA just had some sort of failure and wouldn't control the valves. Note that the IHKA won't run the AC until coded so make sure you can code it if you change it...
The early e70 has the worst climate control setup I have ever had in any car... It is the thing I hate the most about it. Don't get me started on the stratified air being controlled in the idrive...
-Rich