Quote:
Originally Posted by sjh
My pods and functions are right-on. Took the dash off, replaced all, mity-vac'd everything, checked out recirc timer/relay, etc.
What I asked (or am trying to ask) is does the ECC, when cooling, automatically shift from fresh/80%/100% as required?
Thanks.
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Yes, it does. The basic decision on fresh vs. recirculated air is made on the delta T between the set temperature and the interior temperature of the car. Beyond a specific detlta, 100% recirc is used. As the interior temperature approaches the setpoint it switches to 80%, and then fresh air.
As Sixto alludes, there are other factors as well. A complete description resides in the 124 climate manual. The above description exhausts what I can recall from memory.