I am hoping I can get some suggestions on how to troubleshoot problems I am having after a heater core installation.
My son recently replaced the heater core on my '97.
Before the replacement, when heat was working, I didn't get any air from the defrost vent at the windshield. Fresh air venting worked fine.
AFTER replacement of the heater core, I still don't get air from the defrost vent at the windshield, but I also noticed less air flow from the other vents even though I can hear the air flow increasing when I move the fan switch. Also, I cannot switch between heat and fresh air, hot air constantly comes out, even with the switch in the "off" position. I am glad to have heat again, but it sucks not being able to control it!
Any ideas would be appreciated!