Balboa · BP series (TP400, TP600, TP800, TP900, spaTouch panels)Stop using the tub

CNFG FAIL on a Balboa hot tub: configuration error

The control system's configuration is not valid, so the spa will not start. This needs a service call.

Also shown as: Configuration error, CONFIG FAIL, Spa will not start up

Most likely causes

  1. 1Board setup does not match the installed equipmentmost likely
  2. 2Recently replaced board or panel that was not configuredcommon
  3. 3Circuit board faultless common

What to try, in order

  1. Turn the tub off at the breaker for a minute and back on.
  2. If a board or panel was just replaced, contact whoever supplied or installed it.
  3. Have the pack model and the spa make, model, and year ready for the technician.

CNFG FAIL questions

Can I fix a configuration error from the topside panel?

No. It is set up at the board. A power reset is worth one try, then call for service.

Why did this appear after a board replacement?

Replacement boards often ship with a default setup that has to be matched to your spa's pumps, blower, and heater.

Related codes

Balboa -- · Temperature not yet knownBalboa CHEK PH · Maintenance reminderBalboa CLN FLTR · Filter reminderBalboa dr · Heater may be dryBalboa dry · Heater is dryBalboa Ecn · Economy modeBalboa FLO · Low water flowBalboa GFCI FAIL · GFCI test failed

General guidance. Follow your manufacturer's instructions; anything inside the control box is work for a licensed professional. Updated October 5, 2026.