Service Manual for the Thermador Professional Series Rangetop, Model PCG366G
58300000151625_ARA_EN_B
Page 27 of 34
4.2.8 Potentiometer Removal and Replacement
The potentiometers are for the left-side burners only.
1. Follow all safety precautions and steps in the
2. Remove knob from valve stem by slowly pulling knob straight out,
away from control panel.
3. While using a ½ inch wrench to hold the bolt on the solenoid
valve, unscrew the gas tube hex nut with a 9/16th wrench. Then
unscrew the other side of the gas tube attached to the jet holder
assembly and remove the gas tube. Be careful not to bend the
gas tube (see Figure 31).
4. Remove the burner support rail (with jet holder assemblies
attached) by following the steps in the
Burner Support Rail Removal and Replacement
5. First make a note of how the wires are connected to the solenoid
valve terminals, and then remove the wires from the terminals.
NOTE:
It is recommended to label and tag all wires and
harnesses prior to disconnecting them, so as to correctly identify
their connections/locations when re-assembling.
6. Using an adjustable wrench, unscrew the large hex nut on the
solenoid and remove the solenoid valve from the XLO valve. Be
careful not to lose the plastic O ring positioned inside the large
hex nut of the solenoid valve, as it may fall out easily
(see Figure 32).
7. Using a ¼ inch socket wrench/ratchet, remove and retain the
self-tapping screw located under the manifold that secures the
XLO valve onto the manifold (see Figure 28). Be careful not to
lose the rubber washer attached to the screw.
-OR-
Using a ¼ inch nut driver, remove and retain the self-tapping
screw by accessing it from under the chassis base, through the
corresponding access hole (see Figure 28). Be careful not to lose
the rubber washer attached to the screw.
8. Gently lift the protruding part of the XLO valve out of the
receptacle on the manifold (don’t lose the red rubber washer
attached to the XLO valve), and slightly bring out the (connected)
XLO valve/potentiometer assembly from under the front panel. Be
aware of the side connector that is attached.
9. Remove the white plastic side connector from the potentiometer
by pressing on the connector’s tab. (see Figure 34).
10. Detach the XLO valve from the potentiometer by using a small
flat-blade screwdriver to remove the XLO valve from the
potentiometer standoffs. Then slide the potentiometer off the valve
stem (see Figure 35).
11. Replace the potentiometer if needed.
Gas Leaks
Carefully check for gas leaks at each gas component that was
removed, replaced, or otherwise serviced using a gas leak detector or
bubble test.
