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I've just noticed another problem with the heating. There's no heating for the passenger, but I don't really think it's the heater core problem. Although I can hear the blend door motors working when I switch buttons and turn knobs for the passenger, I don't think the door opens as it should because the blow of air from the passenger side vents is close to nothing when it's set to warm. When I set it back to cold, It blows with full power again.
This makes me think it's not just the heater core problem, but rather there is a master hot/cold blend door that opens for the passenger. Thing is, it still isnt possible to fix it without taking the dashboard apart.
Does anybody know what could be done to make the faulty blend door work again WITHOUT dismantling the car's dashboard? Does anybody have the air flow diagram of the heater box to let me know which door it could possibly be?
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