Sounds like your cooling system termostate is stuck open.
625
900-1200
625 @ zero Fahrenheit
What kind of battery for 2002 jeep grand cherokee?
Time for some new air conditioner guys Check to make sure that the compressor is running Check fuses and switch Check that temperature control is working and set to cold position
Coolant level is probably low, Have it checked for an antifreeze leak.
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.
If the transmission in a 1998 Jeep Cherokee skips second gear when it's cold, the bands might need to be adjusted. There could also be an issue with the rear clutch.
Check level of transmission fluid Change transmission fluid and filter
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.
What do you mean by "has no heat"? No air blowing out, blowing out cold air when heater is on, blowing nothing at all? Heater not turning on? What specifically is happening?
625
778DT is one part number but several will fit, top post, minimum of 600-700 cold cranking amps.
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
u need a new cable on the a/c control
625 @ zero Fahrenheit