Jacuzzi Z Builder Series Mechanics And Repair page 17

Then I thought outside the box and now always do it this way: remove the control
box.
On models built from 1995-2001 Platinum, 1995-1996 ECHO, 1998-2001
SELECT:
Turn off main power. Drain spa.
Remove cover on control box. You will see the heater's post coming through the
wall of the control box. There are two. Note on the posts there is a nut holding the
wire going to the in place. To remove the nut and since the post is rather thin, the
manufacturer builds into the post a second nut below the wire. In doing this, you
can loosen and tighten the nut without putting pressure on the post. The
manufacturer recommends you place a wrench above and below to loosen and
tighten the nut. I have found that if care is taken, you only need to loosen/tighten
the nut itself but if you are concerned, by all means use both nuts. I have found
that if you insert your finger to stabilize the post when loosening/tighting the nuts
you can provide enough torque without bending the posts. But care must be
used. Save the nuts because you normally must reuse them.
Disconnect heater assembly from plumbing. ID the heater strap holding the
heater in place. Reach around to the back of the strap where the strap attaches
to the back of the control box. Remove the 2 bolts holding the strap in place. This
will also release the control box from the mounting bracket holding the box to the
spa.
Now note that the box is being held by 2 nuts on the upper corners of the
mounting bracket. Remove those nuts and the whole control box will be free
standing.
The only thing keeping you from pulling the control box up and toward you is the
incoming electrical. Depending on how your electrician wired your spa determines
how easy this will be. If he included slack on the line, you should be able to pull
the box up and toward you enough for your purpose. On rare occasions the
electrician wired the system with no slack. If this is true with your's you have
several choices: first, call an electrician to disconnect the wiring while you replace
the heater,. Or you can remove the heater assembly as mentioned above and
keep the control box in place. Or if you are confident you understand and can