BMW Questions? Ask a BMW Repair Expert for Answers.
Hi, I'm Chad ,Welcome To JustAnswer, I'm reviewing your question and I will be be posting a replay ASAP
there is small actuator motors that moves the air blend door inside your dash when you select max setting?
is there a check engine light on ? and can you have it scanned , in this year model bmw , we can go in the a/c module and run a test on it , recalibrate
and actually command each actuator by itself to see if it is working ?
do you hear any ticking noise coming from inside dash ?
does the condition happens each time you got to max setting and only max setting .?
please let me know
Chad ASE Certified Technician
ok 2 misfires , but no a/c module fault codes, where the car scanned by dealer scanner or equivalent , or just using the engine code reader if i may ask ?
ok i got you
what is the mileage ?
give me sometime , i need to look up the circuit on this one , since we have no faults .
ok great thank you
anything else you can think off, as far as any prior work done that could be related to this .
are these the a/c control (IHKA) unit , you have in the car ?
What special function does list in your scanner under IHKA module ?
1- it is working correctly at max speed all function including the defrost will deactivated by design .
2- I sent you the link to read the description of operation on max setting
Thank YouChad FarhatASE Certified Technician
you said about it is getting warmer at middle vents also, if that is the case , I will check the Freon charge levels or just do an a/c service on your a/c machine .
What happens when you press the re circulation button ,anything changes ?
Can we check Freon ?
ok, how about the freon can we check , do you have a set of gauges , what is the low side reading 20 to 50 psi while running ?
and the high side how high is going up passed 175 ?
63 and 68 is low ? is this car inside shop in cool or outside in the sun when taking those readings?
it can be a Little better, can you run an a/c service Recover, evacuate ,vacuum 45 min and recharge to specs , and see if these number changes , before we think about IHKA unit problem.
let me know
IHKA unit will be what is left .But lack of codes concern me
what kind test can you run on it with your scanner ?
hey how are you
did you get it fixed or you like more help on it
please just let me know
Chad (aka -Customer