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Why do the error codes -F3- and -F4- display on my JES1456WF001 Microwave?

I have found the errors -F3- and -F4- displayed on my microwave it is a GE model #JES1456WF001. I need to know what they mean because the manual states nothing about it.
Joe Rouillard, September 2005
fau;t codes
F3 Key pad shorted for 60 seconds.
F4 open Humidity Sensor.
F5 Shorted Humidity Sensor.

Shaun, September 2005