41
8.9 Pump Runs And Quits During Jet Mode
This is usually a problem of the pump overheating. The pump motor incorporates a thermal cutout
that triggers when the motor gets too hot. There is no reset for this condition. When the motor
cools, the thermal switch resets automatically. In some cases, a faulty circuit can also cause this
problem.
Diagnostic Tools: Clamp-on ammeter, voltmeter.
Suggested Spare Parts (Page 59): Circuit board, pump.
Standard Troubleshooting Approach
Danger: Electrical Shock Hazard Exists!
High Voltage Present On Circuit Board. Use Extreme
Caution While Servicing Circuit Board.
Press JETS 1 button.
Does motor make a
“laboring” sound?
Is voltage from circuit board
to pump correct after pump
quits? Check for 240 VAC
(120 VAC for convertible J-
315 models) at recommended
test points.
Replace circuit board.
Is there sufficient
voltage connected to
hot tub. Check for
240 VAC ±10% (or
120 VAC ±10% for
convertible models)
Call an electrician to
fix problem.
Check voltage with
pump running. Is
the voltage 240 VAC
±10% (or 120 VAC
±10% for convertible
models) at test points
18 and 19.
Replace pump.
This is caused by
insufficient wiring
or the pump motor
drawing too much
current. Contrast
Jacuzzi Hot Tubs
Technical Support.
Pump has thermally
shut down. See page
43.
No
Yes
No
No
No
Yes
Yes
Yes
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