MGD Gas Furnace
Service Manual
SEALED COMBUSTION GAS FURNACE
SERVICE MANUAL
INTRODUCTION
This manual is designed to help understand the basic fundamentals, operation, and
troubleshooting of the MGD line of gas furnaces. It was designed to be used in conjunction with
the installation manual and/or technical manuals provided with each gas furnace. This manual
covers both natural gas and L.P. gas applications.
The controls on the furnace consist of electronic components which are not user serviceable.
Therefore, it is essential that only competent, qualified, service personnel attempt to install,
service, or maintain these products.
WARNING
The information contained in this manual is intended for use by qualified
individuals who are familiar with the safety procedures required in installation and
repair and who is equipped with the proper tools and safety equipment.
Installation or repairs made by unqualified persons can result in hazards subjecting
the unqualified person making such repairs to risk of injury or electrical shock
which can be serious, or even fatal not only to them, but also to persons being
served by the equipment.
If you install or perform service on equipment, you must assume responsibility for
any bodily injury or property damage, which may result, to you or others. We will
not be responsible for any injury or property damage arising from improper
installation, service, and /or service procedures.
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