94 Mazda B4000 no heat


Old 12-03-02, 07:51 AM
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Question 94 Mazda B4000 no heat

The pickup (same as Ford Ranger, V6) has 130K miles on it and yesterday it starts to blow cool air even I turned the temperature switch all the way to the red zone.
How do I approach the fix? It is my first time to deal with heating problem. Since it blows cool air, I assume the blower works. Right? I have a Haynes manual.

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Old 12-03-02, 09:53 AM
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Warm up the truck. Feel both heater hoses. If they are hot, the problem is with the blend door inside the truck. If not, the problem is in the cooling system..flush the system and replace the coolant and thermostat.
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