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

Diagnostics in this service information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to DIAGNOSTIC METHODS for information regarding Ford-specific diagnostic practices.

SYMPTOM CHART

Condition	Possible Sources	Actions
No communication with the HVAC module	Fuse(s) Wiring, terminals or connectors HVAC module	REFER to DIAGNOSTIC ROUTINE J : The Heating Ventilation Air Conditioning (HVAC) Module Does Not Respond To The Scan Tool.
Climate control system functional test	HVAC system and/or related components	REFER to Diagnostic Routine I: Climate Control System Functional Test .
HVAC functions are inoperative/do not operate correctly from touchscreen only	Communication network FDIM	REFER to Diagnostic Routine I: Climate Control System Functional Test .
HVAC functions are inoperative/do not operate correctly from steering wheel switches/infotainment display only	Steering wheel switches Clockspring SCCM IPC	REFER to Diagnostic Routine I: Climate Control System Functional Test .
Reduced outlet airflow	Wiring, terminals or connectors A/C compressor clutch air gap A/C pressure transducer Evaporator temperature sensor A/C clutch relay Blower motor Blower motor control PCM	REFER to Diagnostic Routine I: Climate Control System Functional Test .
The air inlet door is inoperative	Wiring, terminals or connectors Air inlet mode door actuator Air inlet mode door binding or stuck HVAC module FCIM	REFER to Diagnostic Routine I: Climate Control System Functional Test .
Incorrect/erratic direction of airflow from outlets	Wiring, terminals or connectors Defrost/panel/floor mode door actuator Defrost/panel/floor mode door binding or stuck HVAC module	REFER to Diagnostic Routine I: Climate Control System Functional Test .
Insufficient, erratic or no heat	Low engine coolant level Plugged or partially plugged heater core Temperature blend door(s) binding or stuck Temperature blend door actuator(s) HVAC module	REFER to Diagnostic Routine I: Climate Control System Functional Test .
The A/C is inoperative	Fuse(s) Wiring, terminals or connectors A/C system discharged/low charge HVAC module PCM FCIM A/C clutch relay A/C compressor clutch air gap A/C pressure transducer Evaporator temperature sensor A/C compressor clutch field coil	REFER to Diagnostic Routine I: Climate Control System Functional Test .
The A/C operation is erratic. The discharge air warms up when the vehicle comes to a stop.	Engine cooling fan relay Engine cooling fan PCM	DIAGNOSE all PCM DTCs before proceeding. REFER to DTC CHART: POWERTRAIN CONTROL MODULE (PCM) . If no PCM DTCs are present REFER to Diagnostic Routine AJ: The Air Conditioning Operation is Erratic .
The A/C is always on - A/C compressor does not cycle	Wiring, terminals or connectors PCM A/C clutch relay A/C compressor clutch air gap Evaporator temperature sensor	REFER to Diagnostic Routine I: Climate Control System Functional Test .
The A/C is always on - A/C mode always commanded ON	Wiring, terminals or connectors HVAC module PCM FCIM	REFER to Diagnostic Routine I: Climate Control System Functional Test .
Temperature control is inoperative/does not operate correctly - LH	Wiring, terminals or connectors HVAC module Temperature blend door is binding or stuck Temperature blend door actuator FCIM	REFER to Diagnostic Routine I: Climate Control System Functional Test .
Temperature control is inoperative/does not operate correctly - RH	Wiring, terminals or connectors HVAC module Temperature blend door is binding or stuck Temperature blend door actuator FCIM	REFER to Diagnostic Routine I: Climate Control System Functional Test .
The blower motor is inoperative	Fuse(s) Wiring, terminals or connectors Blower motor relay Blower motor HVAC module Blower motor speed control FCIM	REFER to Diagnostic Routine I: Climate Control System Functional Test .
The blower motor does not operate correctly	Wiring, terminals or connectors Blower motor speed control HVAC module FCIM	REFER to Diagnostic Routine I: Climate Control System Functional Test .
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, REPLACE the A/C pressure relief valve. If the system pressure is above the A/C pressure relief valve open pressure, REPAIR the system for a restriction.