Convection Fan Troubleshooting

Problem

Possible Causes

What To Do

Fan motor buzzes

Open capacitor

Harness, terminals, or bad capacitor.

 

 

 

 

Open winding as

 

 

indicated by ohm

 

 

check red to black and

Replace motor.

 

blue to black (approx.

 

 

60 ohms each)

 

 

Check voltage CCW

 

 

to N when fan is CCW

 

No fan operation

- should read 120VAC

• If no voltages, replace ERC.

in Convection Bake.

 

 

• If voltages OK, check harness or winding resistance.

 

Also, CW to N when CW

 

as indicated by ERC

 

 

display

 

 

Shaft or blade rubbing

Loosen screws/re-adjust position/tighten.

 

on oven liner

 

 

 

Jamb switch NC to C is

Replace jamb switch or check harness.

 

open

 

 

 

Loose shaft nut

Tighten shaft nut. Do not bend blade.

Fan loud

Loose convect cover

Tighten screws. Use larger screw if stripped.

 

screws or cavity screws

Oven Sensor Ohmmeter Test

Remove ribbon cable from the upper oven door. Make resistance measurements of the sensors with the exposed terminals of the ribbon cable.

Upper Oven

Pin 13 to pin 14

Sensor

 

Lower Oven

Pin 11 to pin 12

Sensor

 

 

 

Room temp - 1080 ohms Clean temp - 2650 ohms

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GE PT925 manual Convection Fan Troubleshooting, Oven Sensor Ohmmeter Test, Replace jamb switch or check harness, Open

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