Filter
Top Products
28
8.1B No Heat Or Not Enough Heat
• Symptoms: Circulation pump (heating pump) not turning, panel heat indicator not lit,
panel is ashing FL2.
Standard Troubleshooting Approach
Pull wire off flow
switch. Does the
FL2 error message
go away?
Replace wire.
Turn off power to hot
tub. Test flow switch
with ohmmeter for
continuity across
switch terminals (fig.
D-E). Does meter
read continuity
(0)?
Remove flow switch
and inspect for
debris interference.
Remove debris if
present. Test switch
for continuity (0)
when closed and for
infinite when open
(fig. E). Does switch
operate correctly?
Make sure wire is
not shorted when
installed on switch.
Install switch making
sure flow arrow
points in direction of
flow and switch
doesn’t bottom in
fitting (fig. F). Retest
system.
Is wire shorted?
No No
Ye
s
Ye
s
Ye
s
Yes
No
Replace flow switch.
No
Replace circuit
board.
Fig. D
Infinite
Continuity 0
Fig. E
Infinite
Continuity 0
FLOW
Orientation Orientation
FLOW
Fig. F
Pipe End
View
OK
Arrows not
aligned
Arrows
aligned
Open
Closed
Pump
off
Pump
on