Before you reset it 20 times
Photograph the error code, the inlet filter, and the gas or electrical supply. Low flow at one shower may be a fixture, not the heater. No fire plus a gas smell is an emergency, not a code reset.
When a tank is the better repair
If the panel or gas meter cannot support a proper tankless, replacing with a 40- or 50-gallon tank is the honest path. We will say so.
Questions grouped on this page
Related searches are answered here instead of creating one URL per question.
Why is my tankless water heater not making hot water? +
Tankless needs real winter GPM, enough gas or amperage, and descaling in Charlotte hard water. It is not a drop-in for a 40-gallon closet. Photograph error codes; gas odor is an emergency.
Why does my tankless water heater go hot then cold? +
Tankless needs real winter GPM, enough gas or amperage, and descaling in Charlotte hard water. It is not a drop-in for a 40-gallon closet. Photograph error codes; gas odor is an emergency.
What causes a cold water sandwich in a tankless water heater? +
Tankless needs real winter GPM, enough gas or amperage, and descaling in Charlotte hard water. It is not a drop-in for a 40-gallon closet. Photograph error codes; gas odor is an emergency.
Why won't my tankless water heater turn on at low flow? +
Tankless needs real winter GPM, enough gas or amperage, and descaling in Charlotte hard water. It is not a drop-in for a 40-gallon closet. Photograph error codes; gas odor is an emergency.
What does my tankless water heater error code mean? +
Tankless needs real winter GPM, enough gas or amperage, and descaling in Charlotte hard water. It is not a drop-in for a 40-gallon closet. Photograph error codes; gas odor is an emergency.
Why does my tankless water heater show ignition failure? +
A gas tank that will not heat is often pilot/ignition, thermocouple, gas control or venting. If you smell gas or see soot, stop and evacuate. Gas installs start from $1,449 + tax like-for-like.
How do I know if my tankless water heater has scale buildup? +
Tankless needs real winter GPM, enough gas or amperage, and descaling in Charlotte hard water. It is not a drop-in for a 40-gallon closet. Photograph error codes; gas odor is an emergency.
How often should a tankless water heater be descaled? +
40-gal electric installed: $1,199 + tax. 50-gal electric: $1,349 + tax. 40-gal gas: from $1,449 + tax. Expansion tank from $149. Attic, code and hard access are extra from photos.