Test #1: Supply Connections - Whirlpool WETLV27HW0 Service Manual

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 #1: Supply Connections

This test assumes that proper voltage is present at the
outlet, and for U.S. electric dryer installations, a visual
inspection indicates that the power cord is securely fastened
to the terminal block, and for U.S. and Canadian gas dryer
installations, that the power cord is securely fastened to the
wire harness connection.
ELECTRIC DRYER (U.S. Installations):
1. Unplug dryer or disconnect power.
2. Remove the cover plate from the lower center portion of
the back of the dryer.
3. With an ohmmeter, check for continuity between the
neutral (N) terminal of the plug and the center contact on
the terminal block.
¾ If there is no continuity, replace the power cord and
test the dryer.
¾ If there is continuity, go to step 4.
4. In a similar way, check which terminal of the plug is
connected to the left-most contact on the terminal block
and make a note of it. This will be L1 (black wire) in the
wiring diagram.
¾ When this is found, go to step 5.
¾ If neither of the plug terminals have continuity with
the left-most contact of the terminal block, replace the
power cord and retest dryer.
5. Access the machine electronics without disconnecting any
wiring to the timer.
6. With an ohmmeter, check for continuity between the L1
terminal of the plug (found in step 4) and pin C on the
timer.
¾ If there is continuity, go to step 7.
¾ If there is no continuity, check that wires to the
terminal block are mechanically secure. If so, replace
the main wire harness and test the dryer.
7. Check for continuity between the neutral (N) terminal of
the plug and the door switch.
4-8 27" Stacked Laundry Center
n
For Service Technician Use Only
¾ If there is continuity, go to step 8.
¾ If there is no continuity, and the mechanical
connections of the wire are secure, replace the main
wire harness.
8. Visually check that ALL connectors are fully inserted into
the timer and the Start switch.
9. Reassemble all parts and panels.
10. Plug in dryer or reconnect power.
ELECTRIC DRYER (Canadian Installations):
1. Unplug dryer or disconnect power.
2. Remove the cover plate from the lower center portion of
the back of the dryer.
3. Access the machine electronics without disconnecting any
wiring to the timer.
4. With an ohmmeter, check the continuity from the L1 plug
terminal of the power cord to pin C on the timer and from
the N plug terminal of the power cord to the door switch.
¾ If continuity exists for both connections, go to step 6.
¾ If an open circuit is found, check the integrity of the
connections of the power cord to the harness in the
dryer and the integrity of the power cord itself.
5. If it is necessary to replace the power cord, remove the
retaining clip that secures the cord to the back panel.
Disconnect the cord from the main harness and the
ground wire from the rear panel, then pull out the power
cord.
6. Visually check that ALL connectors are fully inserted into
the timer and the Start switch.
7. Reassemble all parts and panels.
8. Plug in dryer or reconnect power.
GAS DRYER (U.S. and Canadian Installations):
1. Unplug dryer or disconnect power.
2. Remove the cover plate from the lower center portion of
the back of the dryer.
3. Check that the power cord is firmly connected to the
dryer's wire harness.
4. Access the machine electronics without disconnecting any
wiring to the timer.
5. With an ohmmeter, check for continuity between the
neutral (N) terminal of the plug and the door switch.
¾ If there is continuity, go to step 6.
¾ If there is no continuity or if there is an open circuit,
replace the power cord. Otherwise, go to step 6.
6. In a similar way, check for continuity between the L1
terminal of the plug and pin C on the timer.
¾ If there is continuity, go to step 7.
¾ If there is no continuity or if there is an open circuit,
replace the power cord. Otherwise, replace the main
harness.
7. Visually check that ALL connectors are fully inserted into
the timer and the Start switch.
8. Reassemble all parts and panels.
9. Plug in dryer or reconnect power.