Maytag ACO1840AB, ACO1840AC, ACO1560AB, ACO1530AB, ACO1560AC, ACO1560AS, ACO1860AC When Start pad is

Troubleshooting Procedures

Check:

1.Primary and Secondary Interlock Switches.

2.Thermostat.

Unit does not heat even	Check the
if display counts down
	contacts of
when START pad is
	RY2 relay.
pressed for high power.

Does relay		Verify proper
contacts measure	YES	connection of
correct resistance.		ribbon
		connector.
NO			Does ribbon
			connector have
Replace		NO	proper
			connection.
circuit
			YES
board.
		Reconnect ribbon
		connector for	Replace
		proper
		connection.	circuit
			board.
Unit operates.

Unit does not heat even if display counts down when START pad is pressed for high power.

Measure resistance of

high voltage transformer.

See to Testing Procedures on page 10.

		Measure
Does transformer	YES	resistance of high		Does capacitor
have the correct		voltage capacitor.
				have correct
resistance.		See to
				resistance.		YES
		Testing Procedures
NO		on page 10.		NO
						Measure
Replace			Replace		resistance of high
						voltage diode.
high voltage			high voltage
						See to
transformer.			transformer.
					Testing Procedures
						on page 10.

	Replace
	high
	voltage
Unit operates.	diode.	NO	Does diode
			have correct
			resistance
	Replace	YES
	magnetron.

16021668 Rev. 0 16 ©2002 Maytag Appliances Company