Tankless Water Heater Hot-Water Problems
Tankless water heaters provide hot water on demand. When they fail to produce hot water, the cause is typically related to flow, ignition, or gas supply.
Common Tankless Hot-Water Failures
No hot water from a tankless unit can result from: flow sensor failure (unit does not detect water flow), ignition failure (burner does not light), gas supply issues, inlet water filter blockage, or control board problems.
Error Code Diagnosis
Modern tankless heaters display error codes that help identify the problem area. Common codes indicate ignition failure, flame loss, overheating, exhaust blockage, or flow-related issues. Recording the error code helps us prepare for the service call.
Tankless Maintenance Needs
Tankless systems require periodic maintenance including descaling to remove mineral buildup. Lack of maintenance can lead to sensor and heat exchanger failures over time.
Safety Reminder
If you smell gas, suspect carbon monoxide or believe there is an immediate danger, leave the property and contact emergency services or the appropriate gas emergency authority. Do not remain inside — exit the building immediately and call for help from outside.