Temperature problem

Hello friends, I do not want to. I have turned the fan contact of my vehicle bought.It starts working at the moment. There is one more thing, my car would run right away, the thermostat changed and now it runs on gas, not directly on the gas, it just started when the thermostat changed.

have the temperature sensor checked

Get past, do not use the vehicle in this way, have the fan and temperature sensor checked immediately.