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Kettle Gas Safety Valve, Kettle Temperature Control, and Kettle Thermopile Diagnosis
313879B 5
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).
TH
TP
TH
TP
1
2
3
ti14524a
Terminal Connections
Step
Part(s) to Be
Checked
Terminal
Connections
Status of
Temperature
Control
Contacts
Desired
Meter
Reading Diagnosis
1 Gas safety
valve
2 and 3 Closed Greater than
100 mV
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.
2 Temperature
control
1 and 2 Closed Less than
80 mV
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.
3 Gas safety
valve magnet
and
thermopile
1 and 2 Open Greater than
325 mV
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.