Water heater not operating with low water flow

What does Small water flow (<0.4 gpm) mean?

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.

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

Click steps to track your progress.

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.