Phoenix Valley water heater specialists
The Water Heater Bros repair and descale tankless water heaters for homeowners across the Phoenix Valley, including Glendale, Tempe and Gilbert. Most tankless problems here start with hard water, and many can be fixed without replacing the unit.
Before you replace a tankless unit, have it looked at. Hard water leaves minerals inside, which can trigger error codes, cut flow and make showers swing hot and cold. A descaling and filter cleaning often brings it back. If a part has failed, we tell you whether fixing it makes sense.
Tankless heaters usually warn you before they quit. If you notice any of these, a repair or cleaning may be all it needs.
Tap a sign to see what it usually means.
Codes point to things like scale, ignition or airflow. We read the code, then confirm the cause before replacing parts.
Often a sign of scale, a dirty filter or a flow sensor that is not reading correctly.
A clogged inlet water filter or scale in the unit can slow the flow at every tap.
If a small trickle stays cold, the flow sensor may not be detecting water moving through.
Mineral buildup acts like insulation, so the unit works harder and takes longer to heat.
With Phoenix Valley hard water, we suggest descaling every year.
Stuck on an error code? Text Tyler or Cam the code and brand. Call or text (602) 901-6418 · Mon–Sat, 8 AM–5 PM.
| Descaling and filter cleaning | About 1 hourDescaling, inlet water filter and built-in air filter cleaning. |
|---|---|
| Error code diagnosis | Varies by unitWe confirm the cause before quoting a part or repair. |
| Flow sensor or part repair | Varies by partDepends on the brand and whether the part is on hand. |
Many tankless repairs cost less than people expect, because the fix is often a cleaning, not a part. When a part is needed, brand and part type drive the price. Bulk ordering and a tool set focused on water heaters keep your price lower.
| Cleaning or part | Descaling and filter cleaning usually cost less than replacing a part. |
|---|---|
| Brand and model | Some brands' parts cost more or take longer to get. |
| Scale buildup | Heavy scale may need more descaling time to clear fully. |
| Which part failed | A flow sensor costs less than a heat exchanger or control board. |
| Unit age | On older units, we weigh repair cost against a replacement honestly. |
Every quote is free and given before any work starts.
Call or text with the brand, the code and what you are noticing. Many codes point us in the right direction before we arrive.
We check scale, the inlet water filter, the air filter, the flow sensor and ignition before naming a fix.
If a cleaning or one part solves it, that is what we recommend. If replacement makes more sense, we explain why.
We flush the unit with an environmentally friendly descaling solution and clean both built-in filters.
We run hot water at several taps, clear the code and tell you how to keep the unit healthy.
Call or text for a free quote by phone. Tyler or Cam will answer your questions. Mon–Sat, 8 AM–5 PM.
Many heaters don't need replacing when they act up. Sometimes a simple repair is the better choice.
We descale with an environmentally friendly solution, then clean the built-in air and water filters.
Tyler or Cam diagnose your unit themselves, with years of hands-on plumbing experience behind them.
AZ ROC 363269. Clear pricing and zero sales pressure, whether we repair or recommend a new unit.
Phoenix Valley water carries a lot of dissolved minerals. A tankless unit heats water fast inside a narrow heat exchanger, and that heat makes minerals settle out as scale. Over months, the scale narrows the passages. That is why so many tankless repair calls here turn out to be overdue descaling.
Summer heat adds its own strain. Units on an outside wall or in a hot garage work hard for months. A yearly visit catches worn parts and clogged filters before they cause a cold shower.
The most common cause in the Phoenix Valley is scale from hard water. Minerals coat the inside of the unit, and the flow sensor or burner struggles to keep up. A clogged inlet filter can do the same thing. Descaling and cleaning the filters often fixes it without new parts.
We recommend once a year for most Phoenix Valley homes because of hard water. A water softener may stretch that out, but scale still builds over time. Descaling takes about an hour and includes cleaning the built-in air filter and inlet water filter.
Often, yes. Many problems are fixed by descaling, a filter cleaning or a single part like a flow sensor. If the heat exchanger is failing or the unit is near the end of its life, we tell you honestly. The decision is yours, with no pressure either way.
We pump an environmentally friendly descaling solution through the unit to dissolve mineral buildup. We also clean the built-in air filter and the inlet water filter. Then we flush the unit, test it and share recommendations to help it last longer.
Some homeowners do, if the unit has service valves and they have a pump and the right solution. Many units here were installed without valves, which makes it harder. If you would rather not deal with it, we can descale it and check the rest of the unit too.
Each brand uses its own codes. Common ones point to ignition problems, airflow, overheating or scale. A code tells us where to look, but it is not always the full answer. Text us the brand and code, and we can often tell you what it likely means.
The flow sensor tells the heater when water is moving so it knows to fire up. If scale or debris builds up on it, the unit may not turn on at low flow or may cut out. Sometimes cleaning solves it. Other times the sensor needs replacing.
Yes. We repair all major brands, no matter who installed them. If we spot install problems, like missing service valves or a vent that is not ideal, we point them out and explain your options. You decide what, if anything, you want fixed.
Call or text Tyler or Cam for a free quote by phone. We work with homeowners across the Phoenix Valley, from Peoria and Glendale to Mesa and Chandler.
