error

we returned and replaced the control with a new one and checked for bad connections , also checked the schematic and this micro has no temperature sensor. results were the same .Oven works fine but micro giving same F3 E2 error . any other ideas?

where is the sensor for the mcro and do you have part number for sensor

Here is the info from the tech sheet for your F3 E2 error code.

1. Disconnect power or unplug oven.
2. Check microwave sensor connection.
3. Measure sensor resistance: 280k Ω at 70° F (21° C), 1k Ω at 392° F (200° C). If resistance
   is not valid replace sensor.
4. If sensor resistance and connections are good, then check for welded-closed relays on
   the control. If relay shorted, replace control.

Make sure your the microwaves temp. sensor is testing at the correct ohm value. Also, make sure your connections for the sensor are good and check for damaged wiring or shorted components to ground. If everything tests good I would replace the electronic control. Attached is a link to the part.