Originally Posted by
Aj Grubb
This was the answer almost three months ago, and it's still the answer now.
I was looking at that picture, and you found your problem.
The airflow through that evaporator is significantly restricted.
Your heater core probably looks about the same.
I know you don't want to do it, but if you want your HVAC system to work as it should, you will have to pull the dash and remove and clean your evaporator and heater core.
If it were me and I had the dash out, I would install a new heater core and evaporator core while I had access.
They are not that expensive compared to the labor required to access them.
Anything else is a waste of your time.
I've been a full-time mechanic for over 20 years.
I've seen lots of evaporators that look just like that.
When you're done, put the aftermarket air filter back in there, and this will probably never happen again.
Replace the air filter every 20k miles or so.
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