Thermador PRL304EG, Service Manual

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Service Manual for Thermador Pro Grand LP Gas Ranges, Models: PRL304EG, PRL364EDG, PRL364ELG, PRL366EG, PRL484ECG, PRL486EDG, PRL486EDPG, PRL484ELG
58300000156573_ARA_EN_B
Page 110 of 119
1. Perform all the steps in Replacing the Bake Burner – Small Oven,
page 105.
2. From the back of the range remove the crossmember panel
(see Crossmember Cover Removal and Replacement , page 75 ).
3. From the back of the range, detach the HSI wire connector (see
Figure 219, page 107).
4. [Only on specific models]: Remove and retain the two screws
securing the HSI shield onto the burner box chassis, and then
remove the shield (see Figure 201, page 100).
5. Remove and retain the screw that secures the HSI onto the burner
box (see Figure 224), and then remove the HSI and its small
bracket (see Figure 203, page 101). Be careful so that the small
bracket doesn’t fall into the burner box.
6. Now remove the HSI by gently pulling its harness and wire
connector out (towards you) through the burner box.
7. Replace the HSI if needed.
NOTE: When installing the HSI onto the burner box, make sure
the small bracket is secured onto the HSI as shown in Figure 204,
page 101. The screw goes through the holes on both the HSI and
the small bracket, fastening them both onto the burner box.
NOTE: When installing the HSI, feed the harness with wire
connector through the portal at the back of the range, as shown in
Figure 219, page 107).
Gas Leak Testing
With electrical power off, carefully check for gas leaks at each gas
component that was removed, replaced, or otherwise serviced using a
gas leak detector or bubble test.
Figure 224: HSI and Electrode on Bake Burner Box – Small Oven
1 Screw securing HSI and small bracket onto burner
box
2 Screw securing electrode bracket onto burner box
3 Screw securing electrode onto electrode bracket
4 Screw securing electrode bracket onto burner box
4.7.7.3 Replacing the Bake Burner Electrode – Small Oven
In some models an electrode ignites the bake burner while in other
models a hot surface igniter (HSI) ignites the bake burner.
For the models that use the electrode as an igniter as well as the
models that use the HSI as an igniter, the electrode also functions as
a flame sensor – that is, if the electrode does not heat up enough in a
short time frame, the electrode will close the solenoid valve to avoid
gas build-up in the burner.