Sorry about the error
yes I6 and no I don't have auto temp control.
Have had certified tech flush system 4 times now, replace hoses and thermostat - yet doesn't fix the heat issue. Blower is fine and system Just wondering if the actual issue is the heater core or whether or not this is the blend door issue reported on other forum posts (hence the reference for heatertreater.net).
If only option is to replace heater core, I'll junk this pos. Given me nothing but trouble for 10 years. Transmission, engine, brakes - you name it.
That's why I'm looking for cheapest way to resolve.