Veeder-Root alarm codes

Find your tank monitor, then the alarm.

Updated October 18, 2026

Which one do you have?

TLS-350

When all is well, it says ALL FUNCTIONS NORMAL.

Silence it: press the red ALARM/TEST key.

Veeder-Root TLS-350 alarms

TLS-450PLUS or TLS4

When all is well, it says SYSTEM STATUS.

Silence it: touch the alarm bar, then touch it again.

Veeder-Root TLS-450PLUS and TLS4 alarms

Code lists

Common alarms

Need a tech?

Veeder-Root support: (800) 323-1799, Mon–Fri, 8 am–6 pm Eastern.

One request. Up to 4 licensed techs call.

We’re not affiliated with any equipment maker.

Sources: Veeder-Root 577014-243, Rev C (2026), Veeder-Root technical support page.