
– 30 –
Convection Fan
Note:
Meat Probe is not on model JB905
Fan motor buzzes
Symptom
Possibility
Correction
Open windings as indicated
by ohm check red to black
and blue to black. (Approx. 60
ohms each)
Open capacitor
Loose shaft nut
Convect cover screws loose
or cavity screws
Check voltage CCW to N
when fan is counterclockwise
- should read 120VAC in
Convection Bake, Also, CW to
N when clockwise as
indicated by ERC display
Shaft or blade rubbing on
oven liner
Harness, terminals or
bad capacitor.
Replace motor.
Tighten shaft nut. Do not
bend blade
Tighten. Use larger screw
if stripped
•
If no voltages, replace
ERC.
•
If voltages OK check
harness or winding
resistance.
Loosen screws/readjust
position/tighten.
No fan operation
Fan loud
Fan loud
No fan operation
No fan operation
No fan operation
Shaft or blade rubbing on
oven liner
Replace jamb switch or
check harness.
CIRCUIT CONDITION TERMINALS OHMS
Room Temp.
6 to 8
1080
Oven Sensor
Clean Temp.
6 to 8
2650
3 to 5
0
Unlatch Unlatched
4 to 5
Open
3 to 5
Open
Latch Latched
4 to 5
0
Oven Sensor and Door Switch Ohmmeter Test
Remove power from the oven. Measure resistance from the side of the sensor and lock switch
connector with exposed terminals removed from the plug.
Summary of Contents for JB905
Page 46: ... 46 JB988 Schematic Schematics and Wiring Diagrams ...
Page 47: ... 47 JB988 Wiring Diagram ...
Page 48: ... 48 JB968 Schematic ...
Page 49: ... 49 JB968 Wiring Diagram ...
Page 50: ... 50 JB905 Schematic ...
Page 51: ... 51 JB905 Wiring Diagram ...
Page 63: ... 63 Notes ...