Not much heat coming out. Please help me

Not much heat coming out. Please help me I need help please. Just purchased a 2010 Dodge Journey. Found out that cold air was coming out of the passenger side of car. We had it flushed out, new thermostat, and finally a new heater core. We still don’t have sufficient heat it is like semi warm both sides. What else can we check? Thanks for reading.
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mcgyver89 [Entry]

There are two thermostats for this vehicle . Did you change both of them ? Also there is a sensor that sits right on top of the thermostat housing if you take that off you will see that it has a Copper leg that regulates the temp. Instead of buying a new one I just took a wire brushes to it and cleaned it up. I didn’t even know it was copper and until cleaned it. there is a small black O-ring that sits on the bottom of copper leg, i’d Replace that after cleaning it.