Symptom Chart - Climate Control Systems

WARNING: This page is about a different car, the 2016 Ford Special Service Police Sedan and 2016 Ford Police Interceptor Sedan. However, it is still accessible from the selected car via links, so may be relevant.

Condition	Possible Sources	Action
NOTE: Some PCM DTCs may inhibit A/C operation. If any PCM DTCs are retrieved, diagnose those first. Refer to Engine Controls - Powertrain DTC Charts & Descriptions (Except Diesel & Hybrid) .
No communication with the HVAC control module	Fuse Wiring, terminals or connectors Communication network HVAC control module	REFER to Module Communications Network .
Externally Controlled Variable Displacement Compressor (EVDC) poor performance/does not operate correctly	Refer to the Pinpoint Test	GO to Pinpoint Test Z .
Unable to duplicate the customer concern and no DTCs present	Refer to the Pinpoint Test	GO to Pinpoint Test H .
The HVAC functions are inoperative/do not operate correctly from touchscreen only	Communication network FCDIM	REFER to Information and Entertainment Systems - 4.2-Inch (107 mm) Screen, 4 Or 6 Speakers or Information and Entertainment Systems - 8-Inch (203 mm) Touchscreen, 7 Speakers Symptom Chart and DIAGNOSE the touchscreen.
The air inlet door is inoperative	Refer to the Pinpoint Test	GO to Pinpoint Test I .
Incorrect/erratic direction of airflow from outlets	Refer to the Pinpoint Test	GO to Pinpoint Test J .
Reduced outlet airflow	Refer to the Pinpoint Test	If the A/C compressor does not cycle, GO to Pinpoint Test M . If the A/C compressor cycles normally, GO to Pinpoint Test R .
Insufficient, erratic or no heat	Refer to the Pinpoint Test	GO to Pinpoint Test K .
The A/C is inoperative	Refer to the Pinpoint Test	GO to Pinpoint Test L .
The A/C operation is erratic. The discharge air warms up when the vehicle comes to a stop.	Refer to the Pinpoint Test	DIAGNOSE all PCM DTCs before proceeding. REFER to the PCM DTC Chart . If no PCM DTCs are present GO to Pinpoint Test X .
The A/C is always on - A/C compressor does not cycle	Refer to the Pinpoint Test	GO to Pinpoint Test M .
The A/C is always on - A/C mode always commanded ON	Refer to the Pinpoint Test	GO to Pinpoint Test N .
Temperature control is inoperative/does not operate correctly	Refer to the Pinpoint Test	For driver side temperature concern, GO to Pinpoint Test O . For passenger side temperature concern, GO to Pinpoint Test P .
The blower motor is inoperative	Refer to the Pinpoint Test	GO to Pinpoint Test Q .
The blower motor does not operate correctly	Refer to the Pinpoint Test	GO to Pinpoint Test R .
A/C pressure relief valve discharging	High system pressure A/C pressure relief valve	CHECK the high side system pressure. If the pressure is below the A/C pressure relief valve open pressure, INSTALL a new A/C compressor. REFER to Climate Control . If the system pressure is above the A/C pressure relief valve open pressure, REPAIR the system for a restriction.