Stuck on defrost vent why?

Heater Core Replaced And Thermostat Replaced. Radiator Flush And Nothing Still No Heat In 3-4 Years. Now I Need More Help.

Heater Blower Blowing On High Barely Anything Coming Out.

2002 Ford Taurus Se Mileage: 79,000 My Interior Fan Controls For The Air Condition, Heater, Defrost Etc Will Not Come On. So Nothing Will...

Driver Side Blows Hot And The Passenger Side Blows Cold. I Changed The Blend Door Actuators And Still The Same Thing. Help!

My Defroster Isn't Working. What Could Be Some Of The Causes And How Expensive Can It Be To Fix It?