Chevrolet Repair: cold engine, upper radiator hose, heater hoses

Question
   92 Chev S10 registers no heat on guage--- Thermostat opens at 210Degrees---coolant full--thermometer checks at 120 in radiator with it coveredin front---150on manifold next tooengine thermostat--- maybe air in system--2.8 litre eng----help me?

Answer
Does the upper radiator hose get HOT to the touch ?. How about the heater hoses ?.

Do you have sufficient heat from the heater vents in the vehicle ?.

Are you SURE the gage on the dash and or the TEMPERATURE SENDER, I did NOT say TEMPERATURE SENSOR, I said SENDER is operational ?.


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