Posted here last week for the first time with some questions about my '98 Jeep and a no heat issue. To make a long story short and admitting I am not much of a mechanic I tackled flushing the heater core. While it seemed to flush ok it did nothing to solve my problem. Symptoms including the engine warming up to operating temperature like normal with ZERO output of heat. Temp gauge held steady at 210 and with heavy driving a very slight bit of heat came out of the vents. When i stopped all air immediately went to cold. Knowing better but doing it anyway I thought a Jeep dealer would be able to troubleshoot fast enough to make the visit worthwhile. The Chrysler/Jeep dealer called with an estimate of almost $2,000 to replace the radiator ($634), replace the water pump ($494), replace the thermostat ($247), replace the serpentine belt ($198) and flush ($125). I immediately went and retrieved the Jeep (paying a diagnostic charge of ($139.95) and took it to a local mechanic who swears the heater core is bad (when i questioned the hoses being warm he said one should be HOT and the other less hot which was not the case.) They were both warm. Will post back upon completion.