Symptom Chart: Climate Control - Dual Automatic Temperature Control (DATC)

WARNING: This page is about a different car, the 2020 Lincoln Nautilus. 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. REFER to: Diagnostic Methods .

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
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 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	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 -- driver side	Refer to Pinpoint Test	GO to Pinpoint Test I
Temperature control is inoperative/does not operate correctly -- passenger side	Refer to Pinpoint Test	GO to Pinpoint Test J
The blower motor is inoperative	Refer to Pinpoint Test	GO to Pinpoint Test K
The blower motor does not operate correctly	Refer to Pinpoint Test	GO to Pinpoint Test L
Insufficient A/C cooling	Improper refrigerant level	PERFORM the refrigerant system tests. REFER to the appropriate General Procedures . If OK, DIAGNOSE for a temperature door actuator not operating correctly.
Insufficient A/C cooling	Temperature door actuator	For inadequate temperature out of the driver side, GO to Pinpoint Test I For inadequate temperature out of the passenger side, GO to Pinpoint Test J
A/C pressure relief valve discharging	High system pressure A/C pressure relief valve	Using the appropriate manifold gauge set, CHECK the A/C 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 system for a restriction. 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. REFER to the appropriate procedure in Removal And Installation .
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.