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8.10 Circulation Pump Not Working
The circulation pump runs 24 hours a day unless “Summer Logic” is activated. Verify the pump
should be on before troubleshooting. Refer to section 5.6 (page 23).
Diagnostic Tools: Clamp-on ammeter, voltmeter.
Suggested Spare Parts (Page 59): Circuit board, circulation pump.
Standard Troubleshooting Approach
*Note: If the circulation pump is running, but there is no water flow, check for an air lock, a blockage in the plumb-
ing, debris in the pump or a broken pump impeller.
Danger: Electrical Shock Hazard Exists!
High Voltage Present On Circuit Board. Use Extreme
Caution While Servicing Circuit Board.
Is 240 VAC (120 VAC for
convertible models) pres-
ent at pump output? Test
points 16 & 17
Make sure circulation
pump should be on. If
pump should be on and
there is no voltage at test
points change circuit
board.
Current draw is proof
that circulation pump is
working. Read steps above
to make sure circulation
pump should be on*.
Is there current draw (0.5
Amp)? Check with clamp-
on ammeter.
Check connection between
circuit board and circula-
tion pump. If connection is
OK, replace pump.
No
Yes
Yes
Circuit Board Illustrations
A. 2006+ LED Models (Page 50-51)
No
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