my car doesn't heat the interior at all. If I took my car and had the cooling system flushed would that maybe help my problem. All of the actuators are working properly. The temperature guage shows normal temperature. The hoses going into the thermostat and coming out each feel equally hot. I am drawing at straws I guess. It will be below freezing at nights this weekend. The resevoir is full also.

 

could be a bad thermostat stuck in the open position.

 

If the thermostat is not opening, the radiator and the hoses at the bottom of it will always be cold.

There could be also an air trap after the flushing if the system was not bleeded properly.