Question about 1995 Dodge Dakota

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Low heat coming from heater

Replaced the AC / Heater switch. Fan works AC works but I am not getting enou heat out of the heater. In fact it blows cool air when driving and fan is on Hi. I replaced the thermostat but it didn't change anything. Is there a vacuum hose that goes to the switch that might be off? What else can I check?
Thanks
Dave

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  • dave_cook Nov 21, 2008

    Flushed core and got good, clean flow. still no heat.

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  • 39 Answers

Heater core may be clogged. disconnect the hoses. CUT THEM OFF THE HEATER CORE!!!! If you pull them you may damage the solder joints at the tubes causing a leak. Them connect a garden hose and flush one way then another till water runs clear.

Posted on Nov 18, 2008

  • Roland
    Roland Nov 22, 2008

    Okay, new thought, Often the blend air door is either stuck or the vacuum diaphram that operates it is defective. Also, the pushbutton selector could be bad. Try this, get a length of vacuum hose. Disconnect the vacuum from the blend air door vacuum diaphram. place one end of the vauum hose on the diaphram the other to a vacuum source. see if the diaphram moves or if you get the desired reaction form your heater. If you get heat, the selector is probably bad. if not, it's the diaphram.

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