Not as an improvised response to unwanted running. Fixtures may still feed the unit while its power is unavailable, creating an overflow risk.
What the observation means
Unexpected operation needs its cause understood. Scheduled isolation does not repair a leak, control problem or discharge issue.
A useful next step
Keep the normal supply arrangement required by the manufacturer and seek assessment of the noise pattern. If the system must be isolated for safety, keep every connected fixture out of use. Do not rely on household members remembering the timer's off periods.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.