Question about 1999 Jeep Cherokee

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Windsheild doesn't defrost completly, has hot air, doesnt do the job

Blower seems to be working, hot air feels forceful but doesn't clear any higher than about 6 inches and not on the sides.

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  • 42 Answers

Heater core leak

Posted on Oct 29, 2012

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: Blower not blowing

can you hear the fan working on all speeds?

Posted on Sep 22, 2008

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SOURCE: The blower for the air condition & defrost is not working

You'll need to check all fuses under dash as well as under hood in fuse/relay box, as one may be blown. Then get back to us if you check them all & are good but still have problem.

Posted on Aug 24, 2009

  • 775 Answers

SOURCE: A/c Heat Fan in 1995 Jeep Cherokee doesnt work. I

there is a blower motor resistor that cuts the voltage for the different fan speeds. this is most likely the culprit. check, you can get access to location and wiring diagrams to be more familiar with it. you have to register and it's free. the switch or wiring might also be bad, when in the high position, the switch effectively bypasses any resistor. although the voltage still runs through the assembley. a repair manual is you best option

Posted on Feb 26, 2010

  • 360 Answers

SOURCE: My 1999 Jeep cherokee sport

Hi, my name is John I will do my best to assist you.

Based on your description here are my thoughts.

  1. Even if your existing thermostat is good, installing one that opens at a higher temperature, for example 195* instead of 192*, will allow the engine coolant to heat up 3* more. This may make enough of a difference in the heater core temperature to make you comfortable.
  2. As I'm sure you're aware hot air rises, so even when you use the floor vents, that warm air doesn't stay at your feet long enough to be of much benefit in extremely cold climates like in KS.
  3. Since you have air movement in all of the various flow modes, I doubt that there are any flow problems in the plenum, or duct system.
  4. Even though your friend flushed the cooling system, there could still be blockage in the heater core. If so replacing the core may be necessary.
This is my advice.

  • Try a 195* thermostat, replacing it is typically simple, and inexpensive. It could make the difference.
  • If you're still not comfortable after replacing the thermostat, consider replacing the heater core.
  • Make sure that your radiator fan isn't running constantly. If the coolant temp sensor is faulty it may be causing the fan to run more than needed resulting in the engine running cooler than it needs to for your climate.
If you have more specific questions please post comments to this thread and I will endeavor to monitor new activity and respond as soon as possible. I recommend that you "bookmark", or "add to favorites" this page for your convenience.

Posted on Feb 15, 2011

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