The AC and heater work normally for trips around town, but after driving for 30-45 mins we lose air flow despite having the fan turned up all the way. Meaning the air flow is the same when set at 1 as it is at 4. It get very hot or cold in a short period of time. We've had the blower motor replaced with no change in this symptom. Like other owners, this is an intermittent problem which creates an issue when taking the car in for diagnosis. I had it in the shop this week for the third time and they let it run for 3 hours without being able to recreate the symptom. We've had two different shops try to diagnose with no luck.
We can turn the car off for a period of time and it will function just fine when restarted. It started with just an issue related to the AC, but now involves the heater also.
Any input is much appreciated!
What makes this problem better or worse?
It's worse after the car has run a longer period of time
How long has your 2017 Mazda CX-3 had this problem?
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