Bosch Evolution 300 Series Service Manual page 53

Electronic Oven &ontrol ,noperative/1o 'isplay
Convection Fan Does Not Operate
Bake Burner Does Not Light
Broil Burner Does Not Light
Oven Light Does Not Work
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• Verify proper power supply to range
• Test for voltage to control module between L1 (black) & N (white)
wires in control module P5 harness connector.
• If proper voltage is present but control module has no display replace
the control module
• Convection fan will not start until oven has been operating for six
minutes.
• Test continuity of convection fan motor windings. Replace motor if
windings are open.
• Test for voltage output to convection fan motor after oven has been
operating for six minutes.
• Verify that gas supply to range is turned on with proper pressure.
• CRQILUP that the service lever on gas regulator is not turned off.
• Test continuity/resistance of oven igniter, gas safety valve and
connecting wires.
• If igniter glows verify minimum current draw of 3.1 amps. If proper
amperage is detected but safety valve does not open replace safety
valve. If amperage is below 3.1 replace igniter.
• If igniter does not glow test for 120 volts output from control module
P5 harness connector pin 1 (yellow wire) to pin 5 (white wire).
• Verify that gas supply to range is turned on with proper pressure.
• CRQILUP that the service lever on gas regulator is not turned off.
• Test continuity/resistance of oven igniter, gas safety valve and
connecting wires.
• If igniter glows verify minimum current draw of 3.1 amps. If proper
amperage is detected but safety valve does not open replace safety
valve. If amperage is below 3.1 replace igniter.
• If igniter does not glow test for 120 volts output from control module
P5 harness connector pin 2 (blue wire) to pin 5 (white wire).
• Verify that light bulb is good
• Test oven door switch contacts and wiring connections
• Test wiring harness connections to light socket.
• With oven door open test for 120 volts output from control module P5
harness connector pin 8 (tan wire) to pin 5 (white wire).
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