Kenmore 721.62642 Basic Field Manual page 31

(2) CHECKOUT PROCEDURES FOR RELAY.
Oven lamp turn on without touching START key
when the door is closed.
NO
GOOD
Replace the
circuit board
- PROBLEM (A) -
YES
Remove the mate connector of I/O
CON from the circuit board.
Does the unit still operate?
NO YES
Defective
RELAY1
Replace
RELAY1
Oven lamp turn on When the door is closed and
YES
GOOD
7-19
- PROBLEM (B) -
START key is touched.
NO
Measure the voltage at pin NO.
35 of U01
Voltage reading: -5 Vdc
NO
Replace the RELAY1 or poor
circuit board
RELAY1 or correct
YES
Defective
connection of
RELAY1
Replace
the connection.