Access Your Control Box
Your control box is the
"brain" of the spa. Most often you find it below the
topside control (command). The control box is where
the incoming power from the house powers the hot
tub. If you do not have experience working with
electrical components you should not attempt to
repair a hot tub. Most are 230vac, some 115v. But
either voltage can be deadly.
Once you have the
power to the hot tub OFF, remove the side panel to
gain access to the control box. Remove the control
it will look something like this
In this example the power
is coming from the house to the spa in the lower
This example the spa is operating on 3 wire, 240vac.
Shown are 3 wires coming from the house (left side
of terminal). A
green ground wire connects tothe box itself and in this example 2 black wires
(on left side of terminal block).
To test the incoming
power, with the power to the spa ON, carefully place
a probe on each terminal lug (never one terminal and
to ground. That will give you a faulty reading.
Always Hot to Hot).
Placing the 2 probes shown
above you should have a reading of 220-240vac. If
you do, incoming power is fine. If you don't, you
incoming power is at fault.
If you are operating your
spa on 110-130vac you will have a black wire, white
wire, and green ground. Do the same test and you
should have 110-130vac. If yes, incoming power is
fine. If no, incoming power is faulty.
some models you will have FOUR wires coming into the
spa. White, Black, Red, and Green. With that setup
do the same test as shown above, Black to Red. You
should have 220-240vac.
IMPORTANT: Its important to check your incoming
power as shown. Test one terminal and ground will
give you a faulty reading.
TEST SHOWS: If proper power is not present your
power to the spa has failed. Contact an electrician.