Aire acondicionado

The Haynes Automotive

Heating & Air Conditioning Systems Manual
by Mike Stubblefield and John H Haynes Member of the Guild of Motoring writers
The Haynes Repair Manual for automotive heating and air conditioning systems
ABCM FGHU

KLMN
2

Haynes Publishing Group Sparkford Nr Yeovil Somerset BA22 7JJ England Haynes Publications, Inc.
861 Lawrence Drive Newbury Park California 91320USA

Acknowledgments
We are grateful for the help and cooperation of Chrysler Corporation, Ford Motor Company, General Motors Corporation, Mac Tools, Inc., Snap-On Tool Corporation, Robinair Division of Sealed Power Corporation and Everco Industries, Inc. for their assistance with technical information, certain illustrations and photos.
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@ Haynes North America, Inc. 1989,1993,2000
Withpermlsslon from J.H. Haynes 8 Co. Ltd.

A book in the Haynes Automotive Repair Manual Series

Printed in the U.S.A.

All rights resewed. No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording or by any information storage or retrieval system, without permission in writing from the copyright holder.

ISBNd 56392 386 5
Library of Congress Catalog Card Number 88-83195
While every attempt is made to ensure that the information in this manual is correct, no liability can be accepted by the authors or publishers for loss, damage or injury caused by any errors in, or omissions from, the information given.

ContentsPreface.........................................................................................................
Chapter One

0-5

Basic theory of air conditioning system operation ....................
Chapter Two

1-1

Basic air conditioning and heating system components ........
Chapter Three

2-1

Typical automotive air conditioning systems ..............................
Chapter Four

3-1

Service and diagnostic tools............................................................
Chapter Five

4-1

Heating and air conditioning system service and repair .........
Chapter Six

5-1

Troubleshooting.................................................................................... Glossary ....................................................................................................

6-1 GL-1

Index........................................................................................................... IMD-1

Heating and air conditioning
Notes

0-4

There was a time when every good mechanic understood the basic svstems of the automobile pretty well. But that time h a ~ - ~ a s s eThe days of the renaissance d. repairman are over. As systems have become more complicated, the investment in training and toolsnecessary to service the entire range of automotive technology found on a typical modern vehicle has widened to the point that no one actually "fixes cars" anymore. Instead, most modern mechanics specialize. Today, we have engine builders, front end specialists, tune-up specialists, transmission specialists, etc. Unfortunately, this approach has created an aura of "black magic" around the more esotericof these topics. Automotive air conditioning is certainly one subject that is poorly understood by nearly all do-it-yourselfers and a lot of professionals as well. The reasons for this situation come down to motivation, money and knowledge. Unlike performance-related topics such as degreeirlg a cam, rejetting a carburetor, etc., air conditioning theory, service and troubleshooting is, frankly,pretty dry stuff. A well maintained air conditioning system won't make a vehicle faster. But it will make it more comfortable. Unfortunately, performance - not comfort - is what gets young mechanics going. Consequently, they don't usually grow up saying "I want to be an air conditioning technician." Then there are the special tools. Even if you are the kind of person who is attracted to air...