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Small water flow (<0.4 gpm)

Water heater not operating with low water flow

Rheem · Water Heaters

¿Qué significa Small water flow (<0.4 gpm) ?

The water heater may not start heating if the hot water flow rate is too low (less than 0.4 gallons per minute). This is a safety feature to prevent dry firing.

Causas comunes

  • Low demand for hot water.
  • Partially closed hot water faucet.
  • Issues with the home's plumbing reducing flow.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Ensure the hot water faucet is fully open.

  2. 2

    Check if other hot water taps are in use, which could reduce flow.

  3. 3

    Increase the hot water flow rate by opening the faucet further.

  4. 4

    If flow remains low, check for obstructions in faucet aerators or home plumbing.

Ver todos los códigos en este manual (70)
Datos técnicos verificados. Última actualización: April 2026

Fallas relacionadas

1111 - Gas shut-off valve is not fully open1212 - Gas service interrupted or LP gas low13Hot and cold water lines reversed
Fuente: Rheem Water Heaters
Open Manual (Page 55)Buscar más códigos en este manual