This model has a common failure with the fan motor connector. Check wjjeeps.com for pictures and a home made solution.
blower motor bad or no power to it chech fuses blower switch blower motor
The blower may simply have burned out. If the blower is out then the heater probably still works.
Need more info like, is the blower working or not, is the air coming out cold or warm when it should be hot, is the air not coming out where it should be.
I mean how do you disassemble the fan blower in a 1998 Jeep Grand Cherokee Laredo. how do you remove the blower fan from the car in the Grand Jeep Cherokee Laredo.
Under the hood, on the passenger side firewall, close to the passenger side fender.
Your blower motor is going out. Be prepared to replace it soon or it will just quit working all together.
Test the resistor bank before getting into anything else. These are the speeed controls for the blower motor.
You can test your heater blower motor by connecting a ground wire to the ground. Connect a power wire, from the battery to the positive post. If the blower motor turns it is working, and if it does not it is bad.
If a 2000 Grand Am sometimes has the heater blower working and sometimes it won't, the problem could be with the heater relay switch. The heater relay switch lets the heater blower know when to come on and when to go off. In most vehicles this switch is behind the glove compartment. This part sometimes gets corroded from condensation in this area.
If you have no heat in your 02 grand Cherokee limited blower works heater lines are hot good circulation just no heat comes out?Maybe blocked heater core. Also check thermostat.Your problem is with the blend doors in the GC. Check the HeaterTreater eBay listings for diagnostic information and a fix.
There is a fuse that protects the HVAC (Heating, Ventilation, Air Conditioning) blower motor circuit.
sometimes this is caused by the blower resistor heating up and shutting the circuit down, or it could be in the blower itself heating up and shutting down.