12 complete symptom paths42 guides and 60 questions in each1,460 Grade A articlesOne searchable, connected knowledge library140 official sourcesEvidence context with explicit limits
Hear the cycle

Sound Lab

Listen for the trigger, not only the noise.

Rhythm, system cycle and strongest location often distinguish movement, flow, vibration and electrical signals.

Describe your clue →
Water loss01

Toilet refills by itself

A short refill cycle occurs without a flush because tank level has fallen.

Trigger
between uses
Strongest location
toilet tank and seal
Open signal profile →
Sensory method

Describe first. Interpret second.

  1. TriggerWhat changed immediately before it began?
  2. CycleDoes it follow startup, flow, heating, wind or room use?
  3. LocationWhere is it strongest, and does that move?
  4. Stop conditionHeat, smoke, gas or electrical odor changes the response immediately.