One problem related to vehicle overheat has been reported for the 2009 Ford Flex. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Ford Flex based on all problems reported for the 2009 Flex.
The vehicle over heats, and just gets too hot. If the a/c is running it over heats just sitting at the light. Now that it is cooler, the heater is on and it over heats just sitting at the light. I stop the car and let it cool down but it should not be operating like this. There are many problems describing this same problem and it is a factory defect and needs to be corrected. No reason just sitting at a stop light for the car to over heat.