i flushed my heater core a month or so back and got my jeep blowing awful hot!! now, a month later, its single digits outside and even when the engine is all warmed up and i've been driving around for 15 minutes the damn thing blows only luke warm.
No, no vaccum lines are disconnected. Yes, my coolant level is full, and the coolant is healthy. No my engine temp does not fluctuate, much like you would get with a bad or stuck thermostat......
friggin hoe mowe heater