Ford Falcon. Manual — part 310

412-03-13 Air

Conditioning 412-03-13

DIAGNOSIS AND TESTING (Continued)

Symptom

Possible Cause

Possible Root

Confirmation Test

Possible Fix

Area

Cause

A/C system

Conduct A/C

Replace blocked

refrigerant blockage Performance test

component

Poor compressor

Inefficient

A/C Cooling fault,

Replace

performance

compressor

refer 412-03

Compressor

pumping

assembly

Loose comp drive

Visual Inspection

Tighten drive belt

belt

Refer 303-05

Slipping comp.

Visual inspection

Replace

clutch

Compressor

assembly

If Comp clutch is

If Comp clutch is

not engaging

…

not engaging

…

Electrical fault

Fuse or

Wiring fault, refer to Repair circuit

disconnected wire

Pinpoint test A

Comp clutch field

Refer to Pinpoint

Replace

coil open circuit

test A for clutch

Compressor

assembly

WAC relay open

Refer to Pinpoint

Replace relay

circuit

test B for Relay

ICC display or

ICC fault, refer

Refer to 413-08

control fault

413-08

HIM / CAN / BEM /

Pinpoint test for

Refer 412-04,

EEC / PCM fault

each Part Refer to

413-08 or 303-14

412-04, 413-08 or

303-14

Blower fan not

Pinpoint test for

Refer 412-04

operating

Blower fan, 412-04

Insufficient battery

Refer to section

Refer 412-04

voltage

412-04

Compressor or

Comp clutch

Visual inspection for Replace

clutch fault

slipping

clutch slip

Compressor

assembly

Excessive clutch air Visual inspection for Replace

gap

clutch engagement

Compressor

assembly

Compressor seized

Hand turn

Replace

compressor

Compressor

assembly

Refrigerant fault

Low A/C system

Conduct A/C

Recharge A/C

charge

Performance test

system to

specification

Insufficient A/C

Refrigerant fault

Low A/C system

Conduct A/C

Recharge A/C

cooling

charge due to

Performance test

system to

improper initial

and Leak test

specification

charge
Air in A/C system

Conduct A/C

Recharge A/C

due to poor

Performance test

system to

evacuation

specification

Contaminant in A/C Conduct A/C

Recharge A/C

system due to poor

Performance test

system to

quality refrigerant

specification

G73303 en

412-03-14 Air

Conditioning 412-03-14

DIAGNOSIS AND TESTING (Continued)

Symptom

Possible Cause

Possible Root

Confirmation Test

Possible Fix

Area

Cause

Excessive A/C

Conduct A/C

Recharge A/C

system charge

Performance test

system to

specification

Excessive

Check repair

Drain compressor,

refrigerant oil

history, conduct A/C Replace

Performance test

Accumulator,

Recharge refrigerant

oil to specifications

Refrigerant flow

Orifice tube

Inspect orifice tube

Replace orifice tube

fault

blocked/restricted
Orifice tube

Inspect orifice tube

Replace orifice tube

bypassed, missing

or damaged O-ring
Incorrect orifice tube Inspect orifice tube

Replace orifice tube

A/C hose/tube flow

Inspect for hose &

Replace faulty part

restriction

tubing restrictions,

kinks, delamination

Air flow heat pick-up Air duct heat pick-up Air distribution fault, Refer to 412-02

fault

fault after

refer to 412-02

evaporator
Air inlet heat pick-up Air distribution fault, Refer to 412-02

fault before

refer to 412-02

evaporator
Air mix door position Air distribution fault, Refer to 412-02

fault

refer to 412-02

Air mix door leak

Air distribution fault, Refer to 412-02

refer to 412-02

Fresh/recirc door

Air distribution fault, Refer to 412-02

position fault

refer to 412-02

Fresh/recirc door

Air distribution fault, Refer to 412-02

leak

refer to 412-02

Poor evaporator

Restricted air flow

Inspect Evaporator

Replace Evaporator

performance

through evaporator

core, Refer to this

(clogged or

chapter

damaged fins)
Restricted air flow to Air Distribution fault, Refer to 412-02

evaporator (filter or

refer 412-02

duct)
Blower fan not

Blower fault, refer to Refer to 412-04

operating correctly

412-04, Pinpoint

test L

Evaporator

Conduct Pinpoint

Replace Evaporator

refrigerant flow

test 412-03-D

blocked/restricted

Poor compressor

Inefficient

Conduct A/C

Replace

performance

compressor

Performance test

Compressor

pumping

assembly

Slipping comp drive Visual Inspection of Tighten Belt

belt

Belt

Slipping comp.

Visual Inspection of Replace

clutch

clutch operation

Compressor

assembly

G73303 en

412-03-15 Air

Conditioning 412-03-15

DIAGNOSIS AND TESTING (Continued)

Symptom

Possible Cause

Possible Root

Confirmation Test

Possible Fix

Area

Cause

Insufficient

Assess oil amount

Add oil as specified

refrigerant oil

in system, using A/C or replace

quantity causing

Noise test

compressor if

comp seizure

damaged

Insufficient

Assess oil return,

Replace

refrigerant oil

using A/C Noise test Accumulator

transfer from

and replacement of

blocked accumulator accumulator

oil pick-up

Poor condenser

Condenser

Conduct A/C

Replace condenser

performance

refrigerant flow

performance test

blocked/restricted
Restricted air flow to Assess air flow

Remove restriction

condenser

across condenser

and compare

against equivalent

vehicle

Restricted air flow

Assess air flow

Clean / Repair fin

through condenser

through condenser

damage or replace

(clogged or

and inspect fins

condenser

damaged fins)
Engine overheating

Engine cooling fault, Refer to 303-03

refer to 303-03

Radiator

Engine cooling fault, Refer to 303-03

overheating

refer to 303-03

Hot air re-circulating Prevent hot air

Prevent

through condenser

re-circulating and

re-circulation with

compare A/C

correct air deflector

performance before and seals

and after

modification

Cooling fan fault

Incorrect cooling fan Test fan operation

Repair fault, replace

operation for

refer to Pinpoint test part

condenser pressure F

conditions
One or both cooling Test fan operation

Replace cooling

fans

refer to Pinpoint test fans

open-circuited/not

F

operating

Incorrect operation

Excessive A/C high

Incorrect cooling fan Engine Cooling

Refer to 303-03

of A/C cooling

pressure

operation for

fault, refer to 303-03

compressor cut-out

condenser pressure

conditions
Excessive A/C

Conduct A/C

Recharge A/C

system charge

performance test

system to

specification

Condenser

Conduct A/C

Replace condenser

refrigerant flow

performance test

blocked/restricted
Orifice tube

Check for

Replace orifice tube

blocked/restricted

temperature

difference before

and after orifice tube

location

G73303 en

412-03-16 Air

Conditioning 412-03-16

DIAGNOSIS AND TESTING (Continued)

Symptom

Possible Cause

Possible Root

Confirmation Test

Possible Fix

Area

Cause

Uneven cooling

Low A/C system

Go to section

Recharge A/C

Passenger vent

charge

412-02, Pin point

system to

outlet air warmer

test K, conduct A/C

specification

than driver vent

system performance

outlet air

test & A/C leak test

A/C compressor

Evaporator

Inspect thermistor

Reassemble

cycles too frequently thermistor

location refer to this thermister

incorrectly located

chapter

A/C compressor

Restricted air flow

Inspect evaporator

Clean evaporator or

excessive cycle on

through evaporator

surface

replace

time

Restricted air flow to Air Distribution fault Improve air flow to

Evaporator

refer to this chapter

evaporator

Air/Moisture in A/C

Conduct A/C

Recharge A/C

system

Performance test

system to

specification

A/C system

Conduct A/C

Replace blocked

refrigerant blockage Performance test

part and Recharge

A/C system to

specification

A/C will not switch

HIM / can / EEC /

Electrical fault, refer Refer to 412-04,

off- electrical fault

BEM / PCM fault

to 412-04, 413-08 or 413-08 or 303-14

303-14

ICC display or

ICC fault, refer to

Refer to 413-08

control fault

413-08

Comp. clutch relay

Pinpoint test B

Replace relay

Evaporator

Pinpoint test 412-04 Repair fault, replace

thermistor short

part

circuit/calibration

fault
Evaporator

Inspect thermistor

Reassemble

thermistor

location refer to this thermister

incorrectly located

chapter

Abnormal Noise

A/C will not switch

Insufficient clutch air Visual inspection of

Replace

off- comp clutch

gap

Air gap

Compressor

fault

assembly

Noisy with A/C not

Drive belt

Visual inspection of

Replace belt

operating

loose/worn

Belt

Comp. clutch

Conduct A/C noise

Replace

bearing fault

test, Hand turn

Compressor

clutch rotor

assembly

Noisy with A/C off,

Blower motor fault

Blower fault, refer to

blower fan on

412-02

Blower fan out of

Blower fault, refer to

balance

412-02

Noisy with A/C

Worn/damaged

Conduct A/C noise

Replace

operating

compressor

test

Compressor

assembly

Comp. clutch

Visual Inspection of Replace

engagement or

magnetic clutch

Compressor

disengagement fault

assembly

Slipping drive belt

Visual Inspection for Tighten drive belt

belt

G73303 en