My 2000 jeep cheerokee keeps overheating

You may want to check first if you are loosing or have inadequate water or cooling fluids on your radiator. There may be a leak or the radiator cap may no longer prevent the steam from escaping. check the radiator fans if they are turning. You can check the fan if it is working by pulling out the temp sensor at the lower radiator hose near the engine. The fan should blow at full once you unplug it. Check also the water pump in the engine if there are leaks. You may have it replaced.

This is what happened to mine. I bought it used and was fine for a few months then started overheating. I could not see any visible leaks anywhere. I finally decided to take it to a mechanic to have him put in a new water pump for me as I figured this must be what it is. He called the next day and said I needed to come and look at what he found. I had a cracked block where the water pump bolts to the block. It was very hard to see but somehow he spoted it. Thank God for extended warranties.

There might be a leak somewhere in the system especially if you have to keep adding fluid. I would pressure test the system and that will tell you whether or not there is a leak, It could be anywhere there. After that then I would test all of the components if there is no leak.