Sears Craftsman 934.20105 Owner's Manual page 31

MAINTENANCE AND TROUBLESHOOTING Page 29
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DIRTY, POROUS, BRITTLE
WELD
Gas flow rate too low
WIRE FEED AND GAS
WORKS, BUT NO ARC
GAS AND ARC WORK BUT
NOT WIRE FEED
WIRE FEED AND ARC
BUT NO GAS
NOTHING WORKS BUT
FAN IS ON
Wind or draft blowing gas
away from weld puddle
Wrong type of gas
Bad ground or
loose connection
Bad connection to gun
or faulty gun
Faulty wire speed circuit
board/potentiometer
No tension on driver roller
Faulty drive motor
(extremely rare)
Faulty solenoid switch
Faulty regulator/fiowmeter
Gas bottle empty
Clogged nozzle or gas diffuser
Faulty trigger on gun
Increase flow rate from
regutator/flowmeter
Try Increasing flow rate or set
up wind break
See select shielding gas
Check ground or tighten all
connections
Check connection to gun or
replace gun
Replace wire speed circuit
board/potentiometer
Adjust drive tension
Replace drive motor
Replace solenoid switch
Have repaired or replace
regulator/flowmeter
Replace gas bottle
Clean or replace as needed
Replace trigger