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Kettle Gas Safety Valve,
Kettle Temperature Control, and
Kettle Thermopile Diagnosis
The gas safety valve, temperature control and thermo-
pile can be checked by using a millivolt meter. Before
checking, make certain all electrical connections are
clean and tight.
Connect millivolt meter to appropriate terminals (see
Terminal Connections).
Part(s) to Be
Terminal
Step
Checked
Connections
1
Gas safety
2 and 3
valve
2
Temperature
1 and 2
control
3
Gas safety
1 and 2
valve magnet
and
thermopile
313879B
Kettle Gas Safety Valve, Kettle Temperature Control, and Kettle Thermopile Diagnosis
Status of
Temperature
Desired
Control
Meter
Contacts
Reading
Closed
Greater than
100 mV
Closed
Less than
80 mV
Open
Greater than
325 mV
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Terminal Connections
1
ti14524a
Diagnosis
If mV reading > 100 mV and the automatic valve (main
burners) does not come on, replace the gas safety valve.
If mV reading < 100mV, proceed with diagnostic steps 2
and 3.
If reading > 80 mV:
•
Clean and tighten electrical connections at tempera-
ture control and gas safety valve.
•
Check valve to make sure wires are in good condi-
tion. Replace as required.
•
Rapidly change temperature setting on temperature
control to see if cycling cleans the contacts.
If the preceding fails to give mV reading < 80 mV, replace
temperature control.
If mV reading < 325 mV:
•
Clean and tighten all electrical connections.
•
Adjust pilot burner to increase millivolt output (see
page 11).
If the preceding fails to give mV reading > 325 mV, replace
thermopile.
Check valve magnet after obtaining correct mV output for
thermopile:
•
Ignite pilot burner only and allow the mV reading to
stabilize.
•
Shut pilot burner (turn gas safety valve knob OFF).
Note the mV reading where magnet drops out.
If magnet unlocks at mV reading < 120 mV, the magnet is
OK. NOTE: When magnet unlocks a click can be heard
and mV reading may fluctuate slightly.
3
TH
TH
TP
TP
2
5
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