Question about 1992 Mazda MX-3

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1992 mazda mx3 heater blows warm, not hot - 1992 Mazda MX-3

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If it ran out of water and you filled it up just before the problem started then their may be air in the system so will need bleading. If that's not the problem then could be a sticking thermostat. Vheck these first and let me know if you need further help I can advise further. Cheer's

Posted on Sep 12, 2009

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  • Master
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Hot air is dependent on the coolant temperature and the heater core. There are several things that can cause your problem. The easiest to check is the coolant level in the radiator\reservoir. There must be enough coolant to flow freely between the engine and the heater core. The next is the thermostat. If the thermostat is not closing it would prevent the the coolant from reaching a high enough temperature to allow for hot air. The thermostat is not expensive or difficult to replace. The third thing is a blockage in the heater core. Flush the coolant system properly can sometimes take care of this. If it does not the only alternative is a new heater core.
Hope this helps.

Posted on Sep 12, 2009

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digritz
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SOURCE: 1992 mazda mx3 heater blows warm, but not hot.

Hot air is dependent on the coolant temperature and the heater core. There are several things that can cause your problem. The easiest to check is the coolant level in the radiator\reservoir. There must be enough coolant to flow freely between the engine and the heater core. The next is the thermostat. If the thermostat is not closing it would prevent the the coolant from reaching a high enough temperature to allow for hot air. The thermostat is not expensive or difficult to replace. The third thing is a blockage in the heater core. Flush the coolant system properly can sometimes take care of this. If it does not the only alternative is a new heater core.
Hope this helps.

Posted on Sep 12, 2009

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