Balboa · BP series (TP400, TP600, TP800, TP900, spaTouch panels)Heads-up

CHEK PH on a Balboa hot tub: maintenance reminder

This is one of the timed maintenance reminders on BP systems: check pH and sanitizer (about every 7 days), test the GFCI (every 30 days), or change the water (every 90 days). Nothing is wrong with the tub.

Also shown as: CHECK PH, CHEK CHEM, Check the sanitizer, CHNG WATR, TEST GFCI

Most likely causes

  1. 1The reminder timer has run outmost likely
  2. 2Reminders are enabled in preferencescommon

What to try, in order

  1. Test the water with a test strip and adjust pH (7.2 to 7.8) and sanitizer per the product labels.
  2. For TEST GFCI, press the TEST button on the GFCI breaker, confirm the tub loses power, then reset it.
  3. For CHNG WATR, plan a drain and refill.
  4. Press any button to dismiss the reminder.
  5. Turn reminders off in the preferences menu if you track maintenance another way.

CHEK PH questions

Is CHEK PH measuring my water?

No. The panel has no chemical sensors. It is a calendar reminder to test the water yourself.

How often do the reminders appear?

Typical defaults are every 7 days for pH and sanitizer, every 30 days for the filter and GFCI test, and every 90 days for a water change. Makers can set different intervals.

Related codes

Balboa -- · Temperature not yet knownBalboa CLN FLTR · Filter reminderBalboa CNFG FAIL · Configuration errorBalboa 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.