Every car make has its quirks, and Chrysler and Jeep vehicles are no exception. In researching this article, we found several examples of heater problems in these vehicles that seem to be fairly common.

On 2001 and 2002 Sebring Sedan, Sebring Convertible and Stratus Sedan, plus 1993 to 2002 Chrysler Concorde, LHS, New Yorker and 300M, Eagle Vision and Dodge Intrepid models with V6 engines, customers may complain their engine is overheating, or the heater is putting out little or no heat.

Chrysler Technical Service Bulletin 07-002-02 says the problem can be caused by a low coolant level in the cooling system. On these vehicles, air trapped inside the cooling system can displace coolant when the system is refilled. The radiator and coolant reservoir may appear to be full, but there still may be air inside the heater core and heater hoses. This will create a low coolant level that may lead to overheating and low heater output. The bulletin provides a special fill procedure to eliminate the trapped air so the cooling system can be completely filled.

The procedure goes as follows:

1. Obtain Chrysler special tool 8195 (Cooling System Filling Aid). The tool looks like a funnel and attaches onto the filler neck (just as a regular pressure cap does). But it also has a hose clip.
2. Attach the filling aid tool to the cooling system filler neck. Use the clip to pinch off the overflow hose attached to the fill neck. At...