My 04 Jeep Grand Cherokee heats up while I'm idling but as soon add I start driving the temperature gage drops and it starts blowing cold air.
Is the elect fan coming on? Either fan is bad or the relay is bad. The relay is in a bad spot under rt. headlamp. You can remove head lamp and cut a hole in the black plastic at the low spot (kind of a dip) Once you have made the hole, Look down in and you will see it. Has 2 screws holding it. But before you condemn relay, Ck to see if you have power and ground going to fan. The connector is on pass side of cooling fan shroud.
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