What is the F4 error fault in GE micro oven - GE Microwave Ovens

"F4" on a GE microwave means you have a failed humidity sensor.
You can get GE parts by searching by model number here.
If you have other questions, please contact me directly since FIxYa doesn't always inform us of follow-up questions.
I would need to know the full model number from the tag on it, and the FCC ID number can be helpful, too.
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If you wish to get some details microwave repair and Error codes ; check the site linked here. Pull up older posts...
http://electro-medical.blogspot.com/

"F4" on a GE is normally a defective humidity sensor.

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

See these files for disassembly help:
http://wwww.microwavedisplay.com/safety.txt
http://wwww.microwavedisplay.com/disassembly.txt

You can find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

F4
or
F5 Humidity sensor open or shorted Replace humidity sensor.

Hi,

Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Basic Microwave Oven Troubleshooting Tips

heatman101

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F4
or
F5 Humidity sensor open or shorted Replace humidity sensor

Probably the "oven temp/flame sensor" if you make microwave popcorn and the vents on the left hand side are restricted. Gets pretty hot. This part cannot be reset and has to be replaced.

You have a faulty keypad. You could probably special order this part from a local appliance parts supply store for 50-60$ or purchase a new microwave.

F4
Open humidity sensor, will occur if humidity sensor is detected as being open continuously over 5 seconds Replace humidity sensor

GE
Microwave Fault Codes Failure
Code Condition Check/Repair F1 Open sensor, will occur below 190F of cavity temperature within 15 minutes after starting convection, combination or roast cook Check oven temperature sensor for continuity. Replace if zero or infinite ohms F2 Shorted thermal sensor, will occur if a shorted thermal sensor is detected continuously over 5 seconds on convection, combination or roast cooking Check oven temperature sensor for continuity. Replace if zero or infinite ohms

Note: It will take a minimum of 5 minutes of convection run time before F1 or F2 code will be displayed if the thermal sensor is shorted or open. F3 Shorted key panel (touch pad), will occur if a shorted key panel is detected continuously over 60 seconds Replace key panel (touch pad) F4 Open humidity sensor, will occur if humidity sensor is detected as being open continuously over 5 seconds Replace humidity sensor F5 Shorted humidity sensor, will occur if humidity sensor is detected as being shorted continuously over 5 seconds Replace humidity sensor F6 Shorted temperature probe, will occur if temperature probe is detected as shorted continuously over 5 seconds Replace temperature probe ProbEe Open temperature probe, will occur if temperature probe is detected open, or not plugged into the receptacle If probe is plugged in and "ProbE" is on display check continuity of the probe with an ohm meter. If zero or infinite ohms, replace it