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Q: car at operational temp fan works on all speeds just blows cold air on 2003 Buick Century

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
has been diong this since cold weather
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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Make sure the 2 heater hoses are hot to the touch the same as the upper hose at operating temp, 180 - 200deg. If those are good, possible temp/blend door actuator, is it dual air control.
not sure about dual air control,it does just have 2 levers one for driver and one for passenger. they don't have actual temperature settings. just little slides that go from blue(cold) to hot(red) It almost seems like the a/c is "stuck" on. by the way thanks for the info
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That is a dual control system, and usually if the actuator was bad it would effect one side or another, not usually both at the same time. Check your coolant level, it has to be full, and your heater hoses.
change the thermostat, if that doesn't work you need to replace the heater control valve/ heater core. or flush your coolant system three or four good times to get contaminated or sludgy fluid
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