Tank monitor alarm won't stop beeping

You can stop the beeper. The alarm stays until it's fixed.

Write down the alarm first: it says what's wrong.

Then look it up in the alarm codes.

Updated October 18, 2026

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Check this first

  1. TLS-350: press the red ALARM/TEST key.
  2. TLS4 or TLS-450PLUS: touch the alarm bar, then again.
  3. No screen? Press the red ALARM RESET button.
  4. Red Jacket IQ box: press Reset/Cal until one green flash.
  5. Franklin Smart Controller: a short press of reset.

When to call a tech

Good to know

Who can fix it

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Sources: Veeder-Root 577014-243, Rev C (2026), p. 1, Veeder-Root D051-330, Rev M (2023), pp. 15, 16, Franklin Fueling Systems 223987101, r6 (2018), p. 9, Veeder-Root: warnings and alarms, Veeder-Root: certified technician training.