Jenn-Air JGS8750BD Series Service Manual page 16

Testing Procedures
To avoid risk of electrical shock, personal injury or death; disconnect power and gas to range before servicing,
unless testing requires power and/or gas.
Illustration
Convection motor,
single speed
Convection element
Downdraft motor
JGS9900BD*
Warmer element
Hi-limit temperature
JGS8850BD*,
switch
JGS8860BD*
(Warming Drawer)
Hi-limit temperature
JGS8850BD*,
switch
JGS8860BD*
(Warming Drawer)
Spark switch
Spark ignition
electrode
Top surface burner
5 K btu, 9.2 K btu
16 K btu
Top surface,
dual ring burner
15 K btu
Top surface,
burner cap
5 K btu, 9.2 K btu
16 K btu
Top surface,
burner cap, dual ring
(inner and outer rings)
Orifice
Orifice holder
5 K btu, 9.2 K btu
16 K btu
Burner valve,
push-to-turn, 270°
5 K btu, 9.2 K btu
16 K btu
16
!
Component
Measure voltage ......................................
Check motor windings to ground..............
Disconnect wiring to element and
measure cold resistance of terminals.......
Measure voltage at convect element........
Measure voltage ......................................
Check motor windings to ground..............
Disconnect wiring to element and
measure cold resistance of terminals.......
Measure voltage at broil element .............
Normally closed, verify operation:
Open: 135° to 145° F (57° to 63° C).......
Closed: 114° to 126° F (46° to 52° C)....
Normally closed, verify operation:
Open: 95° to 105° F (35° to 41° C).........
Closed: 79° to 91° F (26° to 33° C)........
Test for voltage at terminals.....................
Disconnect wiring and check for
continuity in LITE position ........................
Test for resistance of spark lead ..............
Test ignitor to chassis ..............................
Verify gas is supplied ...............................
Verify burner cap is positioned correctly...
Verify gas is supplied ...............................
Verify burner cap is positioned correctly...
Inner: 3 K btu
Outer: 12 K btu
Verify cap is positioned correctly.............. Check for obstructions in burner ports.
Verify cap is positioned correctly.............. Check for obstructions in burner ports.
Check for debris....................................... Clean as needed.
Verify gas pressure ..................................
Check orifice for debris ............................
Verify gas is supplied ...............................
Orifice adjusted for Natural or LP.
Adjust set screw for simmer control.
WARNING
Test Procedure
16026923
Results
120 VAC.
No continuity.
RPM: ............ Approximately 900
Approximately 31 Ω.
120 VAC.
120 VAC.
No continuity.
RPM: ............ Approximately 1550.
Approx. 12.5 to 18 Ω.
120 VAC.
Infinite.
Continuity.
Infinite.
Continuity.
120 VAC.
Continuity in LITE position.
Continuity.
No continuity from ignitor to chassis.
Gas supplied.
Check for obstructions in burner ports.
Gas supplied.
Check for obstructions in burner ports.
5" Natural.
10" LP/propane.
Clean as needed.
Gas supplied.
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