Most common problem is that the blend door is stuck or broken.
Bad thermostat
One of the reasons a 2000 Jeep Cherokee heater would randomly blow cold air and then hot air and then cold might be that there is a problem with the hot/cold duct. The air or a vent might be inadvertently blowing periodically.
You may have a faulty expansion valve. It may prevent compressor from running long enough to cool your car.
The HeaterTreater is an after market kit that solves heater and AC for the Jeep Grand Cherokee and Laredo. It is much cheaper than the dealership fix and is easy to install. For diagnosis and info, check out www.heatertreater.net or search eBay for "heatertreater".
Most likely the blend door. Check your year model at heatertreater.net for diagnostic information and a cheap fix.
The HeaterTreater is an after market kit that solves heater and AC for the Jeep Grand Cherokee and Laredo. It is much cheaper than the dealership fix and is easy to install. For diagnosis and info, check out www.heatertreater.net or search eBay for "heatertreater".
A 2002 Jeep Grand Cherokee uses a group 65 battery with 750 cold cranking amps.
625
i got my 2000 jeep grand cherokee to go 110 ish but it has a spector cold air intake and a thurst muffler and oil change
The HeaterTreater is an after market kit that solves heater and AC for the Jeep Grand Cherokee and Laredo. It is much cheaper than the dealership fix and is easy to install. For diagnosis and info, check out www.heatertreater.net or search eBay for "heatertreater".
900-1200
625 @ zero Fahrenheit