My TDS meter is stuck on 000 / shows HOLDUpdated 3 months ago
The meter shows HOLD
HOLD means the hold function is activated — the meter has locked its last reading on screen. To release it:
- Press the HOLD button on your TDS meter.
- Test your water again normally.
The meter is stuck on 000 and won't change
If the meter reads 000 on everything — including unfiltered tap water — this usually means:
- Your TDS meter has the HOLD setting turned on. Press the HOLD button and test again.
- The battery is dead or low. Replace the LR44 button cell battery (remove the cap at the bottom of the meter). A faded or dim display is also a sign of a low battery.
- The probes are dirty or coated. Rinse the probes with clean water and dry them, then test again.
- Your tap water is genuinely very low TDS. If you live in a soft water area, tap water can read 000 or very close to it. Confirm by testing a known mineral water (e.g. Evian) — it should read well above 000.
The meter turns on but gives inconsistent readings
Make sure the probes are fully submerged and held still for 5 seconds before reading. Movement during testing can cause the reading to jump.
Still having issues?
If none of the above resolves the problem, please contact our customer service team — we're happy to help.