Component Testing Procedures
!WARNING
To avoid electrical shock, personal injury, or death: disconnect power supply before servicing, unless testing requires it.
SETTING | APPROXIMATE SECONDS | |
TIME | ON | OFF |
LOW | 3 | 20 |
MED | 5 | 7 |
HIGH | Constant | 0 |
4.Replace the control if it is not cycling properly. Calibration is not possible.
The surface units and controls offer infinite heat settings. Controls must be pushed down before turning. All surface controls are marked on the control panel for their respective heating element. Infinite switch contacts
L1 - H1 and L2 - H2 provide power to the surface elements.
Resistance / Continuity
A malfunction in the internal switching may fuse the cycling contacts. This causes the heating element to operate at full power, at all control settings, while cycling on element limiter.
Check continuity on infinite switch contacts by using the following steps.
1.Turn off power to cooktop.
2.See “Disassembly Procedure“ to access switch.
3.Remove all control panel knobs. Remove control panel assembly.
4.Remove switch mounting bracket screws. Lift bracket upward. The location of the switch terminals is shown below.
TOP
P L1 L2
H1 H2
Infinite Switch Contacts
5.Remove wiring from switch.
6.Set ohmmeter on R x 1K scale. Check for continuity according to the following chart.
|
|
| Dial Position |
| ||
Contacts | OFF |
|
| HI | ||
L1 | – L2 | O |
| E |
| X |
L1 | – P | O |
| X |
| X |
L1 | – H1 | O |
| X |
| X |
L1 | – H2 | O |
| X – C |
| X |
H1 – H2 | X |
| E |
| X | |
O−Open X−Closed C−Cycles
E−Indicates resistance across internal heater
7.If any contacts fail continuity test, replace infinite switch.
NOTE: During actual surface element operation, contacts L2 - H2 will cycle to maintain the correct heat setting. Contacts L1 - P provide power to the surface element indicator light.
P1
L1H1
H2
L2
Infinite Switch Schematic
If the infinite switch contacts are good and the element does not heat, check for voltage at the heating element terminal plug block. A voltage of 240 V should be indicated. If no voltage is indicated, check for a broken wire or loose connection.
Surface Element (Dual Infinite Switch)
The surface units and controls offer infinite heat settings. Controls must be pushed down before turning. All surface controls are marked on the control panel for their respective heating unit. Indicator ON light uses contacts 2 – 5, which must be closed before contacts 2 – 3 when using the small burner. Also contacts 2 – 5 and 3 – 4 must be closed before contacts 2 – 3, when using the small and large burner. Infinite switch contacts 2 - 3 and 3 - 4 provide power to the surface elements.
Check continuity on infinite switch contacts by using the following steps.
1.Turn off power to cooktop.
2.See “Disassembly Procedures” to access switch.
10 | 16022159 Rev. 0 | ©2003 Maytag Appliances Company |