It started out with a blown head gasket and the person kept driving it and ruined the motor. I replaced the motor but the heat wasnt working before all that. Now I'm having issues with the temperature hand going straight to hot as soon as I start the car and then bouncing around. Back on the heat issue, on low its hotter than high and on high its barely warm. I've flushed the heater core, changed the thermostat, replaced the radiator due to it leaking, I changed the actuator thing under dash by the gas peddle. I changed the fan sensor because the fans weren't working, the computer tempature sensor, the oil and water tempature sensor. I changed the heater control switch. Now I'm running out of options and need help. Please if you know anything I would greatly appreciate it.