Symptom Chart: Climate Control - Dual Automatic Temperature Control (DATC)
WARNING: This page is about a different car, the 2018 Lincoln Continental. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. For information about these practices, Refer to: Diagnostic Methods .
NOTE:
Some PCM Diagnostic Trouble Codes (DTCs) may inhibit A/C operation. If any PCM Diagnostic Trouble Codes (DTCs) are retrieved, diagnose those first. Refer to DTC Chart: Powertrain Control Module (PCM) .
| Condition | Possible Sources | Actions |
|---|---|---|
| A module does not communicate with the diagnostic scan tool | Fuse(s) Wiring, terminals or connectors FCIM |
REFER to: Communications Network . |
| Externally Controlled Variable Displacement Compressor (EVDC) poor performance/does not operate correctly | Refer to Pinpoint Test | GO to Pinpoint Test S |
| Unable To Duplicate The Customer Concern And No Diagnostic Trouble Codes (DTCs) Present | Refer to Pinpoint Test | GO to Pinpoint Test C |
| HVAC functions are inoperative/do not operate correctly from touchscreen only | Communication network FCIM APIM |
Refer to the appropriate Information and Entertainment Systems article for the procedure. |
| Reduced outlet airflow | Plugged cabin air filter | Inspect the cabin air filter. Refer to: Cabin Air Filter . If OK, DIAGNOSE for low refrigerant charge, A/C always commanded on or blower motor not operating correctly. |
| Improper refrigerant level | CARRY OUT the refrigerant system tests. Refer to the appropriate Refrigerant System Tests procedure in GENERAL PROCEDURES . If refrigerant charge is OK, GO to Pinpoint Test H | |
| Blower motor | GO to Pinpoint Test L | |
| The air inlet door is inoperative | Refer to Pinpoint Test | GO to Pinpoint Test D |
| Incorrect or erratic direction of airflow from outlets - front system | Refer to Pinpoint Test | GO to Pinpoint Test E |
| Insufficient, erratic or no heat | Refer to Pinpoint Test | GO to Pinpoint Test F |
| Insufficient heat in Auto Start-Stop mode only | Refer to Pinpoint Test | GO to Pinpoint Test R |
| The A/C is inoperative | Refer to Pinpoint Test | GO to Pinpoint Test G |
| The A/C is always on - A/C mode always commanded ON | Refer to Pinpoint Test | GO to Pinpoint Test H |
| Temperature control is inoperative/does not operate correctly - LH | Refer to Pinpoint Test | GO to Pinpoint Test I |
| Temperature control is inoperative/does not operate correctly - RH | Refer to Pinpoint Test | GO to Pinpoint Test J |
| The front blower motor is inoperative | Refer to Pinpoint Test | GO to Pinpoint Test K |
| The front blower motor does not operate correctly | Refer to Pinpoint Test | GO to Pinpoint Test L |
| The rear blower motor is inoperative | Refer to Pinpoint Test | GO to Pinpoint Test U |
| The rear blower motor does not operate correctly | Refer to Pinpoint Test | GO to Pinpoint Test V |
| Incorrect or erratic direction of airflow from outlets - rear system | Refer to Pinpoint Test | GO to Pinpoint Test X |
| The rear air inlet door is inoperative or does not operate correctly | Refer to Pinpoint Test | GO to Pinpoint Test Y |
| The temperature control is inoperative or does not operate correctly - rear | Refer to Pinpoint Test | GO to Pinpoint Test W |
| Insufficient A/C cooling | Improper refrigerant level | CARRY OUT the refrigerant system tests. Refer to the appropriate Refrigerant System Tests procedure in GENERAL PROCEDURES . If OK, DIAGNOSE for a temperature door actuator not operating correctly. |
| Temperature door actuator | For inadequate temperature out of the LH side, GO to Pinpoint Test I For inadequate temperature out of the RH side, GO to Pinpoint Test J |
|
| A/C pressure relief valve discharging | A/C pressure relief valve | CHECK the high side system pressure. If the pressure is below the A/C pressure relief valve open pressure, 3, 447-4, 137 kPa (500-600 psi), INSTALL a new A/C Compressor. For 2.7L, Refer to: Air Conditioning (A/C) Compressor - 2.7L EcoBoost (238kW/324PS) . For 3.0L, Refer to: Air Conditioning (A/C) Compressor - 3.0L EcoBoost . For 3.7L, Refer to: Air Conditioning (A/C) Compressor - 3.7L Duratec (227kW/301PS) . |
| High system pressure | CHECK the high side system pressure. If the system pressure is above the A/C pressure relief valve open pressure, 3, 447-4, 137 kPa (500-600 psi), REPAIR the A/C system for a restriction. | |
| Climate control does not operate only when remote start is used | IPC information display settings Non-Ford approved remote start system installed |
VERIFY Remote Start - Message Center Set To Auto, or Remote Start - Message Center Set To Last User Settings. Refer to: Climate Control System - System Operation and Component Description . VERIFY module communications network operation. DIAGNOSE Diagnostic Trouble Codes (DTCs) if present. |