Testing Procedures

!WARNING

To avoid risk of electrical shock, personal injury or death; disconnect power to oven and discharge capacitor before servicing, unless testing requires power.

Illustration

Component

 

Testing

 

 

 

Interlock switch assembly

Disconnect wires to switch.

Bottom

 

 

 

Tab

With door open measure resistance from:

 

 

 

COM

Monitor – Terminal COM - NC

Top

COM

Monitor

Monitor

 

 

Magnetron

NC

Primary – Terminal COM - NO

 

 

Switch

Switch

 

 

Interlock

 

 

Secondary – Terminal COM - NO

 

NC

 

 

 

Top

 

 

 

NO

 

 

NO

Primary

Primary

 

With door closed measure resistance from:

Bottom

Magnetron

 

 

 

Interlock

 

 

COM

Switch

Switch

 

Monitor – Terminal COM - NC

 

 

COM

 

 

 

 

 

 

 

Secondary

Primary – Terminal COM - NO

 

 

Secondary

NO

 

NO

Switch

Secondary – Terminal COM - NO

 

 

 

 

 

 

 

COM

 

 

COM

 

 

 

 

 

After verifying or replacing the

 

 

 

 

Tab

 

 

 

 

 

module, reconnect wires to switch

 

 

 

 

 

and check operation of monitor circuit

 

 

 

 

 

before operating the oven.

Electronic Control Panel

 

 

Results

Indicates continuity

Infinite Ω

Infinite Ω

Infinite Ω

Indicates continuity

Indicates continuity

There are two Monitor and Primary switches. See Wiring Diagram to identify proper wiring.

 

 

 

 

 

 

Service Test Mode:

Open door, Press and Hold pad 3 for 5

 

 

 

 

 

 

 

seconds to enter service test mode.

 

 

 

 

 

 

 

Press Pad 1

 

 

 

 

 

 

 

Press Pad 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Press Pad 3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Press Pad 4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Press Pad 5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

................................................Press Pad 6

 

 

 

 

 

 

 

Press Pad 7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Press Pad 8

 

 

 

 

 

 

 

Press Pad 9

 

 

 

 

 

 

 

Press Pad 0

 

 

 

 

 

 

 

Stop/Reset Pad

 

 

 

 

 

 

Error codes:

E-08

 

 

 

 

 

 

 

E-09

 

 

 

 

 

 

 

E-10

 

 

 

 

 

 

 

 

SERVICE appears in the display

Indicates number of hours magnetron has been turned on Indicates number of times magnetron tube has been turned on and off

Indicates number of door cycles CLEAR (Press START pad to

reset service data.) Indicates amperage (Top Mag) Indicates amperage (Bottom Mag)

RESET (Call Service) N/A

N/A

N/A

Exit Service Test Mode

Replace Control Board

Replace Control Board Shorted or Open Keypad – Test and replace if necessary

Illustration

Component

Testing

Results

Electronic Control

Keyboard assembly

Continuity is indicated as

Pad

Trace

Measurement

 

 

100 Ω and below.

0

1

& 8

Continuity

 

 

 

1

2

& 8

Continuity

 

1

 

2

3

& 8

Continuity

 

2

 

3

4

& 8

Continuity

 

3

 

 

4

 

4

5

& 8

Continuity

 

5

 

5

6

& 8

Continuity

 

6

 

 

7

 

6

7

& 8

Continuity

 

8

 

 

 

7

1

& 9

Continuity

 

9

 

 

10

 

8

2

& 9

Continuity

 

11

 

 

 

9

3

& 8

Continuity

 

 

 

 

 

 

QTY 2X

7

& 9

Continuity

 

 

 

HOLD (0%)

1

& 10

Continuity

 

 

 

DEFROST (20%)

2

& 10

Continuity

 

 

 

MEDIUM (50%)

3

& 10

Continuity

 

 

 

MED-HI (70%)

4

& 10

Continuity

 

 

 

TIME ENTRY

5

& 10

Continuity

 

 

 

STOP/RESET

6

& 10

Continuity

 

 

 

START

7

& 10

Continuity

©2006 Maytag Services

16026795

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Maytag 1800 W - 2005 manual After verifying or replacing

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