Service and Troubleshooting
*MES96*U
Copyright © 2019-2020 Goodman Manufacturing Company, L.P.
RS6612017r2
June 2020
TABLE OF CONTENTS
IMPORTANT INFORMATION ............................................ 2
PRODUCT IDENTIFICATION ........................................... 4
SYSTEM OPERATION ...................................................... 6
SCHEDULED MAINTENANCE ....................................... 13
SERVICING ..................................................................... 16
CHECKING VOLTAGE .............................................. 17
CHECKING WIRING .................................................. 17
CHECKNG THERMOSTAT, WIRING ........................ 17
CHECKING TRANSFORMER AND CONTROL
CIRCUIT ...................................................................... 17
CHECKING AIR CIRCULATOR BLOWER MOTOR 18
CHECKING DUCT STATIC ........................................ 18
CHECKING TEMPERATURE RISE .......................... 19
CHECKING PRIMARY LIMIT CONTROL ................. 19
CHECKING AUXILIARY LIMIT CONTROL ............... 20
INDUCED DRAFT BLOWER MOTOR ...................... 20
CHECKING GAS VALVE (REDUNDANT) ................ 20
CHECKING GAS PRESSURE .................................. 21
CHECKING HOT SURFACE IGNITER ..................... 22
CHECKING PRESSURE TRANSDUCER ................ 22
CHECKING FOR DELAYED IGNITION .................... 23
CHECKING INTERGRATED IGNITION CONTROL
BOARDS ..................................................................... 23
CHECKING FLAME SENSOR ................................... 24
TROUBLESHOOTING CHART ....................................... 25
WIRING DIAGRAMS ....................................................... 28
Pride and workmanship go into every product to provide
our customers with quality products. It is possible, however,
that during its lifetime a product may require service.
Products should be serviced only by a qualied service
technician who is familiar with the safety procedures
required in the repair and who is equipped with the proper
tools, parts, testing instruments and the appropriate service
manual.
Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
0140M00517-A
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