Question about 1999 Jeep Grand Cherokee

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1999 Jeep Grand Cherokee Heat not working

I have a 1999 Jeep Grand Cherokee Limited 6 cly.Changed the water pump.Now the heat doesn't work. Blows good but cold air .Before I changed the water pump it would run you out.

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  • brswick Jan 19, 2009

    99 Grand Cherokee Laredo - same problem. Replaced water pump due to external seepage. Radiator is full. Overflow is full. Top radiator hose is very warm & both heater hoses are warm. Problem is luke warm air comes out on floor. Hot air comes out defrost and dash vents. Just luke warm on floor.

  • Anonymous Mar 13, 2014

    1999 jeep grand cherokee shaking and stalling

  • Anonymous Mar 28, 2014

    no heat or ac cold air , blower works fine

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Try your heater core

Posted on Mar 04, 2013

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Change your Thermostat.

Posted on Jan 17, 2009

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1 Answer

2000 jeep cherokee limited dual heat one side only blows hot air


You will have to check the flap operating controls behind the centre consol as anything could be wrong from a vacumn pipe to a operating mechanism ,even the computer controlling the climatic control .

Dec 03, 2011 | 2000 Jeep Grand Cherokee

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maybe the flow thru the internal matrix is poor due to the water pump being on its way out? Or you could have a small leak that is causing the water to boil under normal driving, have you got any loss of coolant or overheating in the engine - even slight?

Also is there a valve controlling flow thru the core, as some cars have a shutoff valve that may be stuck, should be electrical but may be cable operated on yours as its a 4wd jeep etc.

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hi
you have faulty blend doors, try heatertreater.com they have a DIY kit that fixes the problem, it takes around half an hour to fix and works really well.
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Dec 08, 2009 | 2003 Jeep Grand Cherokee

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there is not enough freon in the system or doors problems,check heater funtion to see if it heat all windows,if it work it need to be check with AC gauges or machine for it.

Nov 23, 2009 | 1999 Jeep Cherokee

1 Answer

1999 Jeep Grand Cherokee the heat is not working or blowing?


2 problems?
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Oct 17, 2009 | 1999 Jeep Grand Cherokee

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water pump could be bad and leaking from the weap hole. you have no heat cause theres a hole in the coolant system

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1996 jeep grand cherokee limited v8


With the water pump removed, you have to heat the body of the water pump. There is a O-Ring that seizes the tube into the water pump. Sometimes you can just loosen the bolt and heat the pump with it still bolted up the engine. Use some pliers to wiggle the tube while pulling the tube. When you put it back together replace the o-ring and add some rtv sealant around the o-ring too. This helps the seizing problem. Hope this helps
James
Chrysler Tech

Nov 29, 2008 | 1999 Jeep Grand Cherokee

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