
Service Manual for the Thermador Pro Grand Next Generation 48-Inch Natural Gas and LP Gas Ranges, Models:
PRG486JDG/01, PRL486JDG/01
58300000159722_ARA_EN_D
Page 14 of 92
3.4 Testing Ignition for Burners
Ignition Hazard
Do not touch the rangetop burners when the igniters are sparking.
3.4.1
Time to Ignite
For each burner, push the control knob in and then turn counter-
clockwise to the highest setting. The igniter should produce a clicking
sound as the burner is sparking, and the burner should light within 4
seconds.
NOTE:
It is normal for a burner to spark when a knob is pressed in, or
turned slightly.
3.4.2
Testing Ignition for Standard Burner Settings (HI,
MEDIUM, SIM)
Set the burner knob to
HI
, and observe flame characteristics
(see Figure 5 and Figure 6). If any burner flame burns primarily
yellow, verify if the burner cap is positioned properly on the burner
base, and then re-test. Repeat test for
MEDIUM
and
SIM
settings.
If flame characteristics do not improve, call Thermador technical
support at (800) 444-9091.
3.4.3
Testing Ignition for XLO Burner Settings
Set the burner knob to
XLO
and observe if the flame cycles correctly.
It should be on for approximately 8 seconds, and then off for
approximately 52 seconds of each minute.
3.4.4
Testing Broil Burner Ignition
Set the mode to
BROIL.
After less than a minute (depending on the
model) the burner should ignite. The broil burners do not have an air
shutter, and no adjustment is necessary.
3.4.5
Testing Bake Burner Ignition
Set the oven to
BAKE
at 350° F. After less than a minute (depending
on the model) the burner should ignite and stay lit until 350° F is
reached. During preheat and also during bake mode, the burner
cycles on and off to maintain the temperature.
3.5 Adjusting Bake Burner Flame with the Air Shutter
The bake burner has an air shutter system (see Figure 7) that is
factory pre-set to burn optimally, but depending on the quality of the
gas available, may require adjustment.
Figure 7: Typical Air Shutter
1
Air shutter
2
Adjustment screw(s)
3
Opening