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Drain Pump Strip Circuit
Diagnostics
Does Drain
Pump Run?
Yes
No
Check Air Gap, Disposal etc for clogs,
clean as needed. Check for kinked drain hose, repair as
needed. Remove Ultra Fine Filter and fine filter, clean
sump as needed. Remove Check Valve, clean or
replace if needed.
Is Drain Pump stalled (feel drain
pump for vibration)?
Yes
No
Clean or replace
as needed
Remove connector J703,
check resistance from Blue
–
Yellow, 0.3
–
5.0 mega-ohm is
normal
No
Yes
Replace Drain Pump if
needed
Replace Main Control
Is the circulation pump operational?
No
Refer to Fuse
section of this
Guide
Yes