Two problems related to radiator have been reported for the 2013 Jeep Wrangler. The most recently reported issues are listed below.
Heater core clogged. Radiator sludge leftover from casting sand in cylinder heads circulated thru heating and cooling systems cause sand to settle in radiator and clog heater core.
The vehicle has stopped blowing hot air on the drivers side and feet but will blow hot air on passengers side. This leads to issues with defrosting and visibility as well as the driver being safe and able to feel their fingers and feet while driving. I took it to the dealer who says there is a star report on this issue and it is a well known issue. Jeep however says I am out of warranty so they will not fix it. My extended warranty bought through the dealership says they will not fix it. The radiator, heater core over flow tank and all other related components are the recommended repair.