Water Level Switch - Maytag Jenn-Air Service Manual

The mixing valve has two solenoids, one
on the "HOT" water side and another on
the "COLD" water side. These solenoids
are energized through the timer and
water temperature selector switch and
will allow COLD, HOTor WARM (a mix-
ture of HOT and COLD) water to enter the
tub as directed.
Testing Mixing Valve
The mixing valve can be accessed by
raising the top. The valve can be tested
using an ohmmeter and performing the
following:
1. Disconnect the unit from the power
source.
2. Remove all wiring from the
solenoid(s) being tested.
3. Place the test leads across the termi-
nals of the solenoid being tested.
The meter should indicate continuity.
NOTE: Normal resistance of each
coil is approximately 860 ohms.
4. Place one test lead on one terminal
of the solenoid being tested, and
place the other lead on a suitable
ground. The meter should not
indicate continuity.
WATER LEVEL SWITCH
The water level switch is secured to the
control shield, which is located inside
the control panel assembly, by two (2)
mounting screws.
The water level switch is operated by a
column of air that becomes trapped in
the pressure switch hose. This hose is
connected between the diaphragm sec-
tion of the switch and the air bell which
is located on the lower portion of the tub.
As water enters the tub, a small amount
enters the pressure switch hose thereby
trapping air in the hose. As the water
level increases in the tub, this column of
air becomes compressed and exerts
pressure on the water level switch dia-
phragm. When the proper water level is
reached the diaphragm actuates a single
pole, double throw switch in the water
level switch assembly.
The water level switch is quite sensitive
and requires only about 0.6 P.S.1. to acti-
vate it at the maximum fill position.
Therefore, it is most important that the
hose connections to the switch dia-
phragm and air bell nipple be airtight,
as the smallest air leak will cause erratic
operation.
, - - IMPORTANT-------...,
The water level switch is adjusted and
sealed at the manufacturing source
and no adjustments should be made in
the field.
Whenever the hose is removed from the
water level switch or the air bell nipple,
DO NOT reconnect the hose until all
water has been drained from the tub. To
assure proper operation of the water level
switch, the hose MUST NOT have any
water in it when reinstalled on the switch.
When reconnecting the hose, be sure to
slip it over the nipple(s) as far as possible
and always replace the hose c1amp(s).
16007667 SECTION 7. ELECTRICAL COMPONENTS AND TESTING
7-9
©
1996 Maytag Corporation