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  1. Re: Poor heater output at idle, 2005 Grand Cherokee. I'm stumped!

    No cabin air filter. I am surprised they don't have one. There is plenty of airflow.
  2. Re: Poor heater output at idle, 2005 Grand Cherokee. I'm stumped!

    There is no diverter valve. I measured the temp of the metal tubes that run from the firewall to the heater core to get a better reading than through the hoses. With the engine temp at 203, the...
  3. Poor heater output at idle, 2005 Grand Cherokee. I'm stumped!

    This one has me stumped. Vehicle is an '05 Grand Cherokee, 3.7L with the manual HVAC. The head gaskets and timing components were replaced along with the heads resurfaced about 1 year ago due one...
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