Collant level OK. Engine operating temp njormal. How do u backflush heater core?
Noty sure which hoses are the correct ones but the ones I checked appeared to go through the firewall just off center on the passenger side. 2 were metal and one was rubber. All 3 were on the passenger side just over the valve cover. All were hot.
Took a meat Thermometer and inserted probe into vent on dash. At higest heat setting it was only putting out 90 degree air. This is not enough to warm the cab when outside air is 15 degrees. I have had the jeep since new and the heater always put out plenty of heat. Had a crack in the radiator about a year ago. They replaced the radiator and top and bottom hoses. That was during summer so never really needed to use heater much until this winter.