Balboa · BP series (TP400, TP600, TP800, TP900, spaTouch panels)Fix soon

NO COMM on a Balboa hot tub: panel communication error

The topside panel is not receiving data from the control system. It can appear for a moment at power-up, which is normal. If it stays, the panel, cable, or board has a problem.

Also shown as: Communications error, No communication, NO COMMS

Most likely causes

  1. 1Normal brief message during startupmost likely
  2. 2Loose or wet panel cable connectioncommon
  3. 3Failed topside panelcommon
  4. 4Circuit board faultless common

What to try, in order

  1. Wait a minute after power-up to see if the message clears by itself.
  2. Turn the tub off at the breaker for 30 seconds, then back on.
  3. Check whether the tub is still heating and filtering. If so, the board is working and the panel or cable is the likely fault.
  4. Note the panel model (printed on the back or on the overlay) and the pack model before ordering parts.

NO COMM questions

Can I use the hot tub with NO COMM on the screen?

The tub may keep filtering and heating to its last settings, but you cannot control it. Check the temperature with a thermometer before getting in.

Does NO COMM mean I need a new circuit board?

Not usually. Topside panels and their cables fail more often than boards, especially when water gets under the overlay.

Related codes

Balboa -- · Temperature not yet knownBalboa CHEK PH · Maintenance reminderBalboa CLN FLTR · Filter reminderBalboa CNFG FAIL · Configuration errorBalboa dr · Heater may be dryBalboa dry · Heater is dryBalboa Ecn · Economy modeBalboa FLO · Low water flow

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