Hi, my name is ***** ***** I will be happy to assist with this today.In some cases, I may need more info to assist better.I apologize for any delay.
I am here Sundays through Thursdays from around 5 am to 2 pm Mountain time.If you respond and I do not respond back right away I will do so as soon as I can.
If both heater core hoses are hot with the engine running and heater on high heat or very warm to hot to the touch this isn't a heater core issue here.
This is due to a fault internally in the heater box itself.I only see you have one air mix door so this controls both the driver and passenger side heat.I suspect this actuator is o.k. since you do have the heat on the driver's side as well as air flow.
But there is a restriction internally in the heater box itself causing this issue.This can be a door that came loose internally or foam internally coming loose blocking temp and flow as I have seen in most cases.I have had to remove the heater box from the interior of the vehicle and take it apart to locate what is causing the restriction issue.
Now if one heater core hose is hot and the other is allot cooler then this is a heater core fault and since it has been flushed and still does not work properly the heater core will have to be replaced.
It will be one of these two things here that are causing this fault needing repaired.
If more help is needed, use the reply tab to continue our conversation. If no further assistance is needed, kindly rate my service, your 5-star rating is appreciated ( should be a link to click on here or above).You can rate at any time and we can continue to work on your question as this will not close out your question.I work on delivering the best answer and help here but in some cases, it can be difficult to do without seeing the vehicle.
Thanks Pete