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Tankless water heater guides.
Guides built from the questions tankless owners actually ask: what the codes mean, why the water runs cold, how often to descale, what freezes, and what repairs cost.
Tankless Water Heater Error Codes: What 10 Common Ones Mean
Every tankless water heater error code is the unit telling you which safety check it failed. Tankless water heater error codes are not a shared…
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Tankless Water Heater Not Heating? 7 Things to Check Before You Call
A tankless water heater not heating tends to fall into one of three stories: no hot water at all, water that never gets past warm, or water that used…
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Tankless Water Heater Hot Then Cold? 6 Causes and What Fixes Them
Hot, then a blast of cold, then hot again is one of the most common tankless complaints. A tankless water heater hot then cold can be a normal quirk…
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Tankless Water Heater Won't Ignite? 6 Causes, and Which Ones Are Yours to Check
When a tankless water heater won't ignite, the display usually says so: code 11 on Rinnai, Noritz and Rheem, 111 on Takagi, E003 on Navien. The…
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How to Flush a Tankless Water Heater: 6 Steps, and When to Call Instead
Hard water leaves scale inside a tankless heat exchanger, and a flush is how it comes out. Knowing how to flush a tankless water heater gives you one…
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Tankless Water Heater Keeps Shutting Off? 6 Causes, Starting With the Cheapest
When a tankless water heater keeps shutting off, it is usually reacting to one of a short list of things, and the cheap ones come first. The unit…
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Tankless Water Heater Leaking? 5 Sources and How Urgent Each One Is
A tankless water heater leaking is less likely to flood a room than a leaking tank, because there is no tank full of water to let go. That does not…
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Frozen Tankless Water Heater? What to Do Now, and 5 Ways to Stop It Happening Again
A frozen tankless water heater usually shows itself the same way: cold water works, hot water is a trickle or nothing at all, and the unit may be…
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Tankless Water Heater Making Noise? 6 Sounds and What They Usually Mean
A tankless water heater making noise is not always a fault. A unit with a fan, a burner and a circuit board makes some sound whenever hot water runs.…
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Tankless Water Heater Repair or Replace? 5 Questions That Settle It
Whether to put money into the old unit or buy a new one is the question nearly every owner with a failed tankless asks. Tankless water heater repair…
Read the guideTankless Acting Up? Call Us
Handy to have when you call
- The brand and model from the label
- Any code on the display
- When the problem started, and what the water does