Clothes Dryer User Manual

37
d. Troubleshooting Flowchart - Quick Reference...
First Visual Check
NO SPARK AND SYSTEM DOES NOT WORK
Replace
transformer.
Determine why
voltage is not
present.
Is power available
at primary?
NO YES
Are thermostats contacts and
limit control contacts closed?
NO YES
Close
contacts.
Is 24 VAC present from terminal
THS2 to ground?
NO YES
Check continuity of wiring to
determine why voltage does
not exist at THS2.
Is jumper installed from
terminal 5 to ground?
NO YES
Install
jumper
Open thermostat contacts for 30 seconds.
Close contacts and wait for prepurge (if applicable)
period. Is spark now present?
NO YES
Correct
Replace
Turn off supply voltage.
Check high voltage cable.
Is it securely attached to
spark transformer?
NO YES
Is condition of high voltage
cable good (not brittle, burnt,
or cracked)?
NO YES
Is spark electrode ceramic
cracked or is electrode
grounded out?
NO YES
Replace
Johnson Control
module G760/761
Replace electrode
assembly.
System was in lockout.
Observe a complete operating
cycle to determine why control
locked out.
Is 24 VAC available
at transformer?
NO YES