Question about 1998 Jeep Cherokee

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Heater only blows warm air.

I have a 1998 Jeep cherokee I6 motor. My problem is its winter here in Wisconsin. My heater only blows warm air.No hot air. Things I replaced and done. I have flushed radiator and heater core, replaced thermostat. Both hoses coming from core are warm to the touch. I get warm air from every position on the heater dial. I have read that there are some that get great heat and others only get warm heat. need advice on what to do next.

Pretty cold in Wisconsin. Bye the way its 18 degree out right now. WELLZE

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  • jeffrey wells Nov 21, 2008

    Can you tell me where the silver bar is located . I was also told that only the older cherokees had a heater valve. The 98 doesn't. Is the heater valve your talking about vacuum operated. If so where is that located is it next to the air box behind the glove box.
    Thanks Wellze


  • flb8082 Nov 30, 2008

    i change the antifreeze and new thermostat and it still blowing warm air out .if it is the heater control where is it located.the heater hoses are not hot.

  • Anonymous Mar 16, 2014

    the heater on my 2000 maxima takes a lot longer than it should to make warm air. Motor operating at normal temp. and heats up normal rate when started. Why isn't the heater making heat as soon as the motor warms up

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The hoses from your heater core should be very hot to the touch. Check the hoses going to the core from the water pump. It should be very hot. The return hose should also be very hot. Now check the hoses going to the core. If they are not the same temp, then your heater control valve is not working correctly or the vacuum is not working. At any rate, locate the vacuum line going to the heater valve. Remove the silver bar on the valve from the plastic plunger arm. You will have heat all the time now if it was only a vacuum problem. You can fix it later when it's warmer out. BTW a 200* thermostat will make your heater even hotter.

Posted on Nov 21, 2008

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