Error Code 16

EC16 or Error Code 16

The 16 error code occurs when the outlet water temperature spikes to an abnormally high value. The heater will restrict its water flow as an additional precaution. The error code is reset by unplugging the heater, waiting 20 seconds, and plugging it back in.
 
 Common causes for the 16 error code are:

• Scale deposits¹ in the heat exchanger² and water components
• Improperly adjusted manifold³ pressures
• Wrong gas type

For further technical assistance call 866-766-7489 or use our Contractor Locator to find a local service representative.

ARTICLE DEFINITIONS

Scale¹
A hard mineral coating which forms on the surfaces of water piping. Scaling is more prevalent in areas with high water hardness.

Heat Exchanger²
A device used to transfer thermal energy between two or more fluids (e.g. air, water, oil). The fluids are typically separated and not allowed to mix.

Manifold³
A heater component which distributes gas to the burner plates