Component Testing Procedures
!
WARNING
To avoid electrical shock, personal injury, or death: disconnect power supply before servicing, unless testing
requires it.
16022159 Rev. 0
©2003 Maytag Appliances Company
10
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.
P
L1
L2
H1
H2
TOP
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
LO-MED
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.
L1
P1
H1
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.
