Symptom Chart: Climate Control - EMTC

WARNING: This page is about a different car, the 2013 Ford Explorer. 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 for information regarding Ford-specific diagnostic practices.

SYMPTOM DESCRIPTION - CLIMATE CONTROL - EMTC

Condition	Possible Sources	Actions
No communication with the HVAC module	Fuse(s) Wiring, terminals or connectors HVAC system and/or related components	REFER to PINPOINT TEST J .
Climate control system functional test	HVAC system and/or related components	GO to PINPOINT TEST G .
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	GO to PINPOINT TEST G .
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	GO to PINPOINT TEST G .
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	GO to PINPOINT TEST G .
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	GO to PINPOINT TEST G .
The A/C is inoperative	Fuse(s) Wiring, terminals or connectors A/C system discharged/low charge 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	GO to PINPOINT TEST G .
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 ELECTRONIC ENGINE CONTROLS . If no PCM DTCs are present GO to PINPOINT TEST Y .
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	GO to PINPOINT TEST G .
The A/C is always on - A/C mode always commanded ON	Wiring, terminals or connectors HVAC module PCM FCIM	GO to PINPOINT TEST G .
Temperature control is inoperative/does not operate correctly	Wiring, terminals or connectors HVAC module Temperature blend door is binding or stuck Temperature blend door actuator FCIM	GO to PINPOINT TEST G .
The blower motor is inoperative	Fuse(s) Wiring, terminals or connectors Blower motor relay Blower motor HVAC module Blower motor speed control FCIM	GO to PINPOINT TEST G .
The blower motor does not operate correctly	Wiring, terminals or connectors Blower motor speed control HVAC module FCIM	GO to PINPOINT TEST G .
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 AIR CONDITIONING (A/C) COMPRESSOR - 3.5L TI-VCT, 3.7L TI-VCT or Refer to AIR CONDITIONING (A/C) COMPRESSOR - 2.0L GTDI or AIR CONDITIONING (A/C) COMPRESSOR - 3.5L GTDI . If the system pressure is above the A/C pressure relief valve open pressure, REPAIR the system for a restriction.