I can start my blazer drive down the road and temp get hot but when I shift to neutral and Rev it temp goes back to its normal. Could it be thermostat sticking?

Blazer runs great no. Symptoms at all really. I had. Change the sensor and the service. Light is still on...it has a new one on that side and switch the old one on the opposite side and the light had… 

When I bought vehicle the blower worked... but it sat for a time and now the only time the air flows is when vehicle is in motion. Hot or cold both work but not can... could it be the blower motor or… 

Running hot ! No leaks! Air not on. Heat not on. New water pump. New thermostat! Still over heat! Y???

Coolant runs out and mechanic says it's the water pump and thermostat! Is it expensive!

My 2001 Chevy tracker is over heating I have put a new water pump ,thermostat and it is still over heating someone told me it could be a sensor that could be bad is there one that can do that