Tankless Water Heater
Tankless water heaters heat water as it flows instead of storing it. They have different failure points than tanks: scale in the heat exchanger, error codes, flow sensors and venting.
Plumbing Nation is a referral service. Your call is connected to an independent plumbing provider, subject to availability in your area. Plumbing Nation may receive compensation when your call is connected with a participating provider. Providers are independent businesses.
Common signs
- An error code on the unit display
- Hot water that turns cold mid-shower
- Reduced flow at hot taps
- Scale buildup in hard water areas
What the provider typically checks
Service often includes descaling the heat exchanger, checking inlet filters, reading error codes and checking gas supply and venting. Installation may require gas line and venting changes.
Before you call
Write down any error code and the model number. Note whether the problem happens at all taps or one.
Related services
- Water Heater Replacement: Replacing a failed or aging tank water heater.
- No Hot Water: Diagnosing why the hot water has stopped.
Questions
How often should a tankless unit be descaled?
It depends on water hardness and use. Many manufacturers suggest periodic flushing; check the manual for your model.
Can a tankless unit run out of hot water?
It will not run out, but it can only heat a certain flow rate at once. Running many fixtures together can lower the temperature.
Who decides what the work will cost?
The independent provider sets the scope and the charges after looking at the problem. Confirm all details directly with the provider on the call.
Call for Water Heater Repair
Calls about tankless water heater are connected to an independent plumbing provider, subject to availability. Plumbing Nation may receive compensation when your call is connected with a participating provider. Providers are independent businesses.