I got a heat issue

The issue is.... No heat

Blend door seems to be working.
Fluid ok
No leaks
Temp gauge is normal

So on my way to work (while still blowing cold air) I floored it and suddenly I started getting hot air. But will it last? Who knows?

Do I have a clogged heater core? Or another problem?

Mechanic at work said the Dextron **** will clog

Any help

Thanks

 

That would be my suspicion. Has it ever been flushed both directions?
Talk to a mechanic who actually knows about DexCool (not Dexron, that's GM's automatic transmission fluid.)

 

no not in both directions. i will try that this weekend.

btw...i messed up with saying Dextron. (he did say Dexcool) my mistake!