Service and Troubleshooting
Copyright © 2019-2020 Goodman Manufacturing Company, L.P.
RS6621004r3
October 2020
TABLE OF CONTENTS
IMPORTANT INFORMATION ............................................. 2
PRODUCT IDENTIFICATION ............................................ 4
SYSTEM OPERATION ....................................................... 6
SCHEDULED MAINTENANCE ........................................ 24
SERVICING ...................................................................... 27
CHECKING VOLTAGE ............................................... 28
CHECKING WIRING ................................................... 28
CHECKING THERMOSTAT, WIRING ........................ 28
HEATING ANTICIPATOR ............................................ 29
CHECKING TRANSFORMER AND CONTROL
CIRCUIT ....................................................................... 29
CHECKING AIR CIRCULATION BLOWER MOTOR 29
CHECKING DUCT STATIC ......................................... 33
CHECKING TEMPERATURE RISE ........................... 33
CHECKING PRIMARY LIMIT CONTROL .................. 34
CHECKING AUXILIARY LIMIT CONTROL ................ 34
CHECKING FLAME ROLLOUT CONTROL .............. 35
INDUCED DRAFT BLOWER MOTOR ....................... 36
CHECKING GAS VALVE (REDUNDANT) ................. 36
CHECKING MAIN BURNERS .................................... 36
CHECKING ORIFICES ............................................... 37
CHECKING GAS PRESSURE ................................... 37
CHECKING HOT SURFACE IGNITOR ...................... 38
CHECKING FOR FLASHBACK .................................. 39
CHECKING PRESSURE SWITCH............................. 39
HIGH ALTITUDE APPLICATION ................................ 39
CHECKING FOR DELAYED IGNITION ..................... 39
CHECKING INTEGRATED IGNITION
CONTROL BOARDS ................................................... 40
MEMORY CHIPS ......................................................... 41
CHECKING FLAME SENSOR .................................... 41
TROUBLESHOOTING CHART ........................................ 42
WIRING DIAGRAMS ........................................................ 52
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.
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WARNING
WARNING
Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
0140M00517-A
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