Jenn-Air JGS8750ADB Service Manual page 16

Testing Procedures
To avoid risk of electrical shock, personal injury or death; disconnect power and gas to oven before servicing,
unless testing requires power and/or gas.
Illustration
Bake burner
Ignitor
Broil element
Hi-limit temperature
switch
Double thermal valve/
shut off valve
Pressure regulator
Convection assembly
Convection motor
Model JGS8850AD*
Cooling fan motor
Venturi, right front, left
front, left rear burners
Venturi, right rear
burner
Electronic control
NOTE: To avoid
equipment damage,
use caution when
checking electronic
control circuitry
voltages.
Power cord 3-wire
16
!
Component
Verify gas is supplied.
Orifice adjusted for Natural or LP ...........
Check for obstructions or
contamination in ports ............................
Test for voltage at terminals ...................
Test for the amount of amperage in
the circuit................................................
(Ignitor may glow but not have
sufficient amperage to open valve.)
Disconnect wiring to element and
measure resistance of terminals.............
Measure voltage at broil element............
Normally closed, verify operation:
Open: 269° to 291°F (132° to 144°C) .....
Closed: 173° to 207°F (78° to 97°C).......
Verify gas supply is turned on at
regulator .................................................
Attached to pressure regulator at the
rear of the unit.
Verify gas pressure (W.C.P.)..................
If on LP service verify proper gas
supply conversion.
Measure voltage.....................................
Check motor windings to ground ............
Measure voltage.....................................
Check motor windings to ground ............
Shutter settings ...................................... Nominal: .038" (tolerance: .035" to
Shutter settings ...................................... Nominal: .038" (tolerance: .035" to
L1 ...........................................................
Jumper ...................................................
Door logic sensor ...................................
Meat probe .............................................
Bake burner............................................
Broil burner.............................................
Verify resistance of wires to terminals .... Continuity
WARNING
Test Procedure
16022089
Results
Factory set to Natural Gas.
Adjust as necessary.
Air shutter opening set to .469 to .531.
Replace if punctured or torn.
120 VAC.
3.2 − 3.6 Amps If not replace.
Approximately 16 Ω.
120 VAC.
Infinite.
Continuity.
Gas ON red tab up (at regulator).
Gas OFF red tab down (at regulator).
5" Natural
10" LP/propane
Gas ON red tab up.
Gas OFF red tab down.
120 VAC. (tolerance: 105 to 135 VAC)
No continuity.
RPM: Approx. 800 (tolerance: 600 to
1000 RMP).
120 VAC.
No continuity.
RPM: Idle: 3395.
Load: 3000.
Breakdown: 2400.
.041").
.041").
P26 (Black) to P5 (White): 120 VAC.
P18 to P23 (Black).
P4 (Red, pin 5) to P4 (Black, pin 2):
Door Locked: Continuity.
Door Unlocked: Infinity.
P2 (Red) to P2 (Red). See "Meat
Probe" chart.
P17 (Red) to P5 (White): 120 VAC.
P25 (Yellow) to P5 (White): 120 VAC.
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