I blew the fuse on the motherboard of a GE Adora Refrigerator and I need to fix it how do I repair it and install the new fuse

normally there is a glass fuse in the circuit where the power comes in
check that fuse/ replace if necessary
As silly as it sounds --turn the equipment of at the wall before you work on it as it might have been you that blew and not the fuse

The fuse is there to protect your home in case something has gone wrong inside your microwave. Since the fuse has blown twice, you can safely assume that there is something wrong inside. It may be fixable, it may not be economic to fix it. Impossible to troubleshoot electronics without the unit and test equipment.

Often a dryer heating element burns out, but doesn't trip the circuit breaker or blow a fuse. The heating element is simply a long coil of special wire. You can check it for continuity with an ohm meter. No continuity means the element is bad and you need to replace it--electric heating elements aren't repairable.
On many dryers, there's a thermal fuse mounted to the exhaust duct inside the back cover panel. The fuse--which is about an inch long--is usually embedded in black resin and mounted in a white plastic housing. If the fuse has blown, you need to replace it. (You can't re-set it.)

You will have to investigate to find out if you have blown an internal fuse. Try and trace the wires and see where they end up . If you can get your unit up and running again, insulate the wires and make enquiries as to what they are for from where you purchased it.

under the dashboard its probably a 15 amp fuse . there should be a diagram on the fuse box that says what is what .it probably also blew out the cig. lighter ... good luck

Check circuit fuse,electrical connections,check your door circuit & buttons.

You may have lost a thermal fuse.

The dometic recall requires the installation of a thermal fuse from the DC terminal block to the igniter,  Originally it was a solid wire connection, and the recall replaced this wire with a thermal fuse imbedded.  On my unit the installer placed the fused wire too close to the burner sheet metal and, viola, the fuse blew (being thermal).  Camping World found the problem in 5 minutes and repaired it in another 10 minutes. $107.00. 

Maybe the pump got jammed and stalled and blew the fuse.