Chrysler Repair: 03 Concorde: no heat:/self-diagnostic, diagnostic capability, floor vents

Question
warmed the car up for 10 minutes, drove it for 35 minutes before getting any warm air to come out.  Tried auto @ 78, then different manual setting, it was 13 degrees outside.  Finally after driving for 35 minutes, setting it @ 80 on floor vents, warm (not hot) came out.

Answer
Hi Kit,
There is a self-diagnostic capability built-in to the system. To use, start the engine and set the temp control to 75 degrees. Then simultaneously press and hold the three right-hand side buttons. The readout will start blinking. Then release the buttons. The readout will continue to blink. Then a two-digit number will display after a while. Note it, then press the Mode button to see any other possible numbers. Keep pressing the mode button and observing for numbers. Finally the display will return to the normal appearance. If no numbers appear, then the problem is elsewhere in the system.
Write back with the numbers and I can tell you what to do.
Roland