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presumably you have changed the thermostat if so and still no heat, i would suggest that you check to see if there is hot water going to the heater core. check to see if there is hot water going through the hoses leading to and from the heater core. if, after the car is warmed up and both hoses are hot, then I suspect the problem is with the vent flaps that control air flow through the duct work in the dash if only one hose is hot then you have a plugged heater core and you need to take it out and replace it. if neither hose is hot, you may well have a problem with a blocked house or a failed water punmp although that would probably show itself though the engine overheating. i would be interested to see what you find

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โˆ™ 2005-12-14 00:57:05
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Q: How do you find out what is wrong with your Plymouth voyager as it is only blowing cold air no matter what you try?
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