Goodman [A/G]PG - Gas Heating Service Analysis Guide

SERVICING
26
GAS HEATING - SERVICE ANALYSIS GUIDE
Complaint No Heat Unsatisfactory Heat
POSSIBLE CAUSE
DOTS IN ANALYSIS
GUIDE INDICATE
"POSSIBLE CAUSE"
SYMPTOM
System Will Not Start Burner Won't Ignite Burner Ignites-Locks Out Burner Shuts Off prior to T'Stat being Satasfied Short Cycles Long Cycles Soot and /or Fumes To Much Heat Not Enough Heat
Test Method
Remedy
See Service Procedure Reference
Power Failure
•
Test Voltage S-1
Blown Fuse
•
Test Voltage S-1
Loose Connection
••
Check Wiring S-2, S-3
Shorted or Broken Wires
••
Check Wiring S-2, S-3
No Low Voltage
•
Check Transformer S-4
Faulty Thermostat
••••
Check Thermostat S-3
Faulty Transformer
•
Check Transformer S-4
Poor or High Resistance Ground
•
Measure Ground Resistance S-313
Improper Heat Anticipator Setting
•• ••
Adjust Heat Anticipator Setting S-3
Improper Thermostat Location
•• ••
Relocate Thermostat
Faulty Limit or Roll Out Switch
••
Test Control S-300-302
Faulty Flame Sensor
•
Test Flame Sensor S-314
Faulty Ignition Control
•••
Test Control S-313
Gas Valve or Gas Supply Shut Off
•
Turn Valves to On Position S-304
Faulty Induced Draft Blower
•• •
Test Blower S-303
Dirty Flame Sensor, Low uA
•
Clean Flame Sensor S-314
Flame Sensor not in Flame, Low uA
•
Test/Adjust Position of Flame Sensor S-314
Faulty Gas Valve
•••
Replace Gas Valve S-304
Open Auxillary Limit
•••
Check Airflow
S-200, 201
S-300, 301
Improper Air Flow or Distribution
•••
Check Duct Static S-200
Locking out on Main Limit
•• •
Check Limit, Gas Press., & Temp. Rise
S-300,
307, 201
Delayed Ignition
•
Test for Delayed Ignition S-308
Flashback
•
Test for Flashback S-309
Orifice Size
•••
Check Orifices S-306
Gas Pressure
••••
Check Gas Pressure S-307
Cracked Heat Exchanger
•
Check Burner Flames S-302
Stuck Gas Valve
•••
Replace Gas Valve S-304
Unit Undersized
••
Replace with Proper Size Unit
Faulty Pressure Switch
•••
Test Pressure Switch S-310
Blocked or Restricted Flue
••
Check Flue/Drawdown Pressure S-310
Open Roll Out Switch
••
Test Control S-302
Bouncing On Pressure Switch
•••
Test Negative Pressure, Flue Blockage S-310
Unit Oversized
••
Replace with Proper Size Unit