It sounds like the bypass module, or the key that you have in a universal bypass box is not programmed. When remote starting the vehicle check to see if the yellow key light starts flashing on. That would confirm my prognosis.
SOURCE: Heater not working
Depending on what package the Jeep came with, you could have a broken or disconnected vacuum line to the heater doors.
If it's electronic, there could be a blend door accuator not working.
There could be a bad heater control valve or just a engine thermostat that's staying open all the time.
SOURCE: 1998 jeep grand Cherokee....(interior lights)i can not get the
the cargo light right at the back hatch is a switch...I have the same jeep and could not figure out how to shut off the lights, I figured this out after a while.
SOURCE: jeep grand cherokee computer problems (will not
there are specific tests you can run before changing parts...You should show an open circuit with no resistance between b&c connector pins on the crank sensor. (check with ohmeter) You also need to check that you have fuel /spark and test related items. (cps can kill both)
SOURCE: 96 jeep grand cherokee starts but wont idle
CHECK FUEL REGULATOR ON FUEL INJECTOR RAIL,&ALSO FUEL PUMP, CHARLIE
SOURCE: i have a 2002 grand jeep cherokee and when i start
do a self test on your Jeep's computer by turning the ignition key off-on,off-on,off-on ( on is when the dash lights are on, off is one click back). The codes will either flash out on your check engine light in pairs, 5-5 is the end of the test. or if you have a digital odometer the codes will display there. Report back with the codes to help identify any problems.
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