Installation Guide

W415-1696 / 10.12.16
24
EN
4.5 HIGH LIMIT SWITCH TESTING
Unplug the appliance
(if hardwired, turn off circuit breaker)
Leave appliance turned off for 15-20 minutes
for the appliance to cool down
NOTE: THIS ENSURES THE HIGH
LIMIT SWITCH HAS COOLED
DOWN AND RESET
Inspect wires to and from the high limit
switch to ensure there are no damaged
or disconnected wires
If the appliance is shutting off constantly 8-10 sec
after heater button is pushed. The high limit
switch and/or circuit is open
Inspect wires # 9, 10, 11, 12, 13, and 19.
Refer to the wiring diagram
Ensure there are no frayed
or damaged wires
Replace broken
connectors or wires
Check continuity from the N.O. terminal
to the left terminal of the high limit switch
Check continuity from he N.O. terminal
to the left heater terminals
START HERE
Replace the PCB.
Refer to section 5.6 (Control Board
Replacement)
YES
YES
NO
YES
NO
NO
NO
YES
YES
NO
Are there any broken
connectors or wires?
Unplug # 19 wire from PCB
to the T-fuse connector
Measure continuity from N.O. terminal
on the biggest relay of the PCB
Check continuity from N.O. terminal to
the right terminal of the high limit switch
Is there continuity?
Is there continuity?
Is there continuity?
Is there continuity?
Replace the PCB.
Refer to section 5.6 (Control
Board Replacement)
Replace the high
limit switch. Refer to
section 5.12
(High Limit Switch,
Heater, and Blower
Replacement)
Replace the high
limit switch. Refer to
section 5.12
(High Limit Switch,
Heater, and Blower
Replacement)
Replace the high
limit switch wire