I replaced the probe but I still get f3 code.
Answer Hello Don. If the probe is new, and the wiring is good, you will need to replace the control on the unit.
Is there a test for the relay?
Answer Harold, Yes it is possible to test a relay with a multi meter. In your case, the relay coil is where the black wires attach to the relay terminals. With power removed to the range and wires removed from the terminal, you should be able to read a "closed" circuit across the terminals if the coil is operable. You can then check for a closed circuit between the "com" and "no" terminals on the relay and read a "closed' circuit as well. If you attach the black wires, make a selection and check from the "com" and "n/c" terminals, that circuit should "close" and the "com" and "no" circuit should "open".