Welcome to the Spa Doctor.

 

Trips GFCI

 

In 99% of the time it's the heater when the gfci pops.

To confirm you can remove the heater from the loop. First thing is to turn off the MAIN POWER SWITCH.

To isolate the heater depends on which model you have but in general, ID the heater. It's the steel tube strapped to the back or bottom of most models. Some models have it strapped to the left side.

Once you ID the heater, remove the metal cover on the control box. You will find 2 posts of the heater inserted through the control box from the heater. You will either disconnect the connection from the pcboard to the heater. If you have copper straps connecting the board to the heater, remove the 2 screws holding the copper to the board and CAREFULLY bend the copper 1/8" away from the board. Be careful because the heater post will bend and break.

If you have wires connected to the heater posts, CAREFULLY remove the nuts holding the wire contacts to the heater posts. Again, be careful you don't bend the posts. On the heater posts are slots allowing you to install an open end wrench above and below the nut to apply torque without bending the posts. This is best but if you are careful you can remove the nut without bending the posts. Once you disconnect the wires make sure they are not touching anything.

Turn of Main power or GFCI breaker.

If the spa comes on, replace the heater. Find the heaters at: HEATERS

If the spa still pops the gfci, click here: Popping GFCI