HELP. I have a 2010 F350 6.4
I have no heat in my truck. the dummy gauge is reading normal but no heat. we followed the diagnostic chart and replaced the heater core, still no heat and then on a whim replaced the thermostats and still no heat. engine apers to be running fine with the exception of the exhaust regen kicking in every 10 miles [yup I am a smoker]. im lost any ideas

 

How is the coolant level? Water pump??

 

If the engine is up to temp, the heater hoses, both are warm to hot, it's time to get under the dash. I'm not an expert but if the heater core is getting warm and you still don't heat a blend door or something isn't working correctly.

 

Try doing an On Demand Self Test of your heating system and see if all your doors and actuators are moving. You can hear them when you go through this process.

The Electronic Automatic Temperature Control (EATC) Module On-Demand Self Test will detect concerns in the system control functions and will display on-demand (hard fault) DTCs for concerns that are present during the self-test. The vehicle interior temperature should be between 4°C-38°C (40°F-100°F) when carrying out the self-test. If the temperatures are not within the specified ranges, false DTCs may be displayed.

The self-test can be initiated after cycling the ignition switch from OFF to ON. Normal operation of the climate control system stops when the self-test is activated.

To enter the self-test, press the OFF and DEFROST buttons simultaneously and release, then press the AUTO button within 2 seconds. The display will show a flashing blower icon for 20 seconds, after which all vacuum fluorescent segments will be displayed if there are no on-demand DTCs present. If DTCs are present, the EATC module will display "00 00" and then on-demand DTCs. Record all DTCs displayed.

If any DTCs appear during the self-test, carry out the diagnostic procedure. Refer to the Electronic Manual Temperature Control (EMTC) Module and Electronic Automatic Temperature Control (EATC) Module DTC Chart and follow the ACTION for each DTC given.

If a condition exists, but no DTCs appear during the self-test, GO to Symptom Chart Condition: The EATC System Is Inoperative, Intermittent or Incorrect Operation.

To exit the self-test and retain all DTCs, press any button except DEFROST. The EATC module will exit the self-test and retain all DTCs.
To exit the self-test and clear all DTCs, press the DEFROST button. The EATC module will exit the self-test and all DTCs will be cleared.

Always exit the self-test before powering the system down (system turned OFF). Once the self-test is exited, the ignition switch must remain ON for at least 30 seconds to allow the door actuators to automatically recalibrate.
Continuous DTCs will be deleted after 80 ignition switch ON cycles after the intermittent fault occurs. Hope this helps.

 

Yeah this sounds like it could be a EATC issue to me.

 

Excellent info here....thanks!