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Check lint Filter
Clean if needed.
Explain to owner responsibility to
and safety reason.
Run dryer on a heat cycle for
one minute.
If heat is felt, unit may have a
vent problem, Investigate venting
system.
Is vent too long?
Fully or partially clogged, etc?
Check voltage of connector to
connector
CAUTION: Potential for voltages
over 100Vac. Proceed with care.
①
Igniting = 120Vac ± 10%
②
Stop = 0
Unplug UNIT /
Check the gas valve nozzle
clogged.
Unplug UNIT / Check gas valve
①
Valve1 terminal >
1.5kΩ~2.5kΩ
①
Valve2 terminal >
1.5kΩ~2.5kΩ
Unplug UNIT / Check Igniter
Resistance value = 50~800Ω
Unplug UNIT /
①
Open at 370
℉
(Maximum)
≒
∞
②
Close at 320
℉
<
1Ω
Unplug UNIT / Test thermostats
Hi-limit
①
Open at 203 ± 41
℉
(95 ± 5
℃
)
≒
∞
②
Close at 158 ± 41
℉
(70 ± 5
℃)
<
5Ω
Safety
①
Open at 230 ± 41
℉
(110 ± 5
℃
)
≒
∞
②
Close – Manual reset
Retest heating circuit
Defective gas
valve
Defective Igniter
Defective Flame
detector.
Defective
Thermostat. If
Safety thermostat
Is open, replace
Both after
Determining what
Caused thermo-
stat
to open
No
No
Yes
No
Yes
No
Yes
Yes
Yes
Yes
Yes
No
No
No
No
Troubleshooting
for inadequate
Defective main
PCB
Remove foreign
body.
Not heating (Gas)
29