Whirlpool WETLV27HW0 Service Manual page 58

TESTING – DRYER
DANGER
Electrical Shock Hazard
Only authorized technicians should perform
diagnostic voltage measurements.
After performing voltage measurements,
disconnect power before servicing.
Failure to follow these instructions can result in
death or electrical shock.
TEST #3c: Gas Valve
(Gas Dryer)
1. Unplug dryer or disconnect power.
2. Access the gas valve by removing the front access panel.
3. Use an ohmmeter to determine if a gas valve coil
has malfunctioned. Remove harness plugs. Measure
resistance across the terminals.
Readings should match those shown in the following
chart; if not, replace coils.
GAS VALVE RESISTANCE
GAS VALVE RESISTANCE
Terminals Terminals
1 to 2
1 to 2
1 to 3
1 to 3
4 to 5
4 to 5
Black
Light Blue
White
Figure 11 - Measuring gas valve resistance.
Figure 1 - Gas Valve
4-12 27" Stacked Laundry Center
n
For Service Technician Use Only
Resistance
Resistance in ohms
in ohms
1400 ± 70
1400 ± 70
570 ± 28.5
570 ± 28.5
1300 ± 65
1300 ± 65
White
Light Blue
4. Disconnect the ignitor plug from the burner. Using an
ohmmeter, measure the resistance across the ignitor's
2-pin connector. Resistance should be 50–500 Ω.
¾ If resistance readings are outside the range or open,
replace the ignitor.
¾ If resistance readings are within range, reconnect the
ignitor plug and continue to step 5.
5. Disconnect the wires going to the flame sensor terminals.
Using an ohmmeter, measure across the two sensor
terminals for continuity.
¾ If there is continuity, reconnect the sensor wires.
¾ If the reading is open, the flame sensor needs
replacing.
6. Plug in dryer or reconnect power.
7. Run a high-temp TIMED DRY cycle of at least 2 minutes in
duration.
8. Watch the ignitor for a couple of minutes. If the ignitor
stays red hot and the gas does not come out and ignite,
the flame sensor needs replacing.
NOTE: If ignitor does not come on, line voltage may not
be present at the gas burner. The motor centrifugal switch
may be suspect.
Gas Valve Schematic
2
1400 ± 70 Ω
Figure 2 - Gas Valve Schematic
50-500 Ω
3
1
570 ± 28.5 Ω
4 5
1300 ± 65 Ω