went to warm up the slobalt and shes blowing ice cold air! thermostat is fine, coolant temps are normal and the engine heats up just fine. my heater core is not leaking and flowing just fine (tested by feeling the hoses running to it which were both hot). fuses are fine, and im stuck. could my hvac controls be fried? maybe the actuator which switches the airflow from hot to cold is stuck or broken? i dont know where to start! and its very cold out. if any of you guys have any ideas or pointers throw em my way!