Does anyone know why 2004 honda civic hybrid's heater doesn't work?

anna

New member
Car mileage 130000, fan blows cold air when idle or when driving below 50mph. But it works fine when driving above 50mph. Changed air hoses, I was suggested by the dealer to change the whole heating system (costs around 1500). I don't want to spend that much to fix the heating system. does anyone know if this is a quick fix?
 
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