Where is the water coming from?
A tank that leaks through its own wall or bottom cannot be patched, so the heater needs replacing. Water at a fitting, connector, relief valve, or drain valve is a repair.
Tank, tankless, gas, and electric
Water Heater Repair for Tank, Tankless, Gas, and Electric Heaters
Water Heater Warehouse AZ, the water heater team of One Call Plumbing Services in Mesa, repairs gas, electric, tank, and tankless water heaters across 26 Phoenix Valley communities. We find the cause first, then tell you whether a repair is worth it.
Watch for these signs
Signs your water heater needs a repair
- No hot water at any fixture
- Showers turn lukewarm partway through
- Water pooling under or around the heater
- Rumbling, popping, or crackling while it heats
- Rusty, cloudy, or rotten-egg-smelling hot water
- An error code, a pilot that will not stay lit, or a breaker that trips
Our services
What a repair visit covers
- Finding where a leak starts: tank body, fitting, valve, or nearby pipe
- Gas control, pilot, igniter, flame sensor, and venting checks
- Electric element, thermostat, high-limit switch, and wiring tests
- Tankless error codes, inlet filters, and scale-related faults
- Relief valve, drain valve, and shutoff valve replacement
- A repair-or-replace recommendation before any work begins
Your options
Repair or replace your water heater?
These are the three questions we answer before recommending a new heater.
How old is the heater?
ENERGY STAR advises considering replacement once a water heater is more than 10 years old. The manufacture date is on the label or encoded in the serial number, and we can read it for you.
Is this the same failure again?
When the same part keeps failing, the cause may be sediment, scale, venting, or a heater too small for the household. Another new part will not fix that, so we look for the reason.
Around the Valley
Hard water shortens the time between repairs
Valley water leaves minerals in tanks and on tankless heat exchangers. Rheem suggests planning a flush or descale about every six months in hard-water areas, and your heater's manual sets the interval for your model.
Planning the work
What affects a repair price
- Which part failed, and the heater's make and model
- Gas, electric, or tankless equipment
- Where the heater sits and how easy it is to reach
- Related valves, connectors, or venting that also need work
Water heater problems and their likely causes
Each symptom has a short list of usual suspects. This is where a diagnosis starts, and which of them turn out to be repairable:
- No hot water, gas tank: the pilot or igniter, the flame sensor or thermocouple, the gas control, or a venting safety shutoff. These are repairable parts.
- No hot water, electric tank: a tripped breaker or high-limit switch, or a failed element or thermostat. Repairable, but a high-limit that trips again needs its cause found.
- Hot water runs out fast: a failed lower element, sediment taking up tank space, or a heater too small for how the home uses water now. Parts are repairable; a sizing problem calls for a different heater.
- Rumbling or popping: sediment on the bottom of the tank, which ENERGY STAR and Rheem both name. A flush may help; a tank that keeps rumbling is wearing out.
- Rusty hot water: corrosion inside the tank or a spent anode rod. An anode can be replaced; rust from the tank itself means it is failing.
- Rotten-egg smell in the hot water only: a reaction at the anode rod. Rheem notes a different anode type can solve it.
- Tankless error code, ignition failure, or temperature swings: scale in the heat exchanger, a clogged inlet filter, flow below the unit's minimum, or an ignition or venting fault. A. O. Smith notes that tankless units are descaled with a cleaning solution, not drained and flushed like a tank.
Water heater leaking? Do this first
A leaking water heater is an emergency. Our emergency line, 480-663-2255 (shared with One Call Plumbing Services), answers 24 hours a day, 7 days a week, nights, weekends and holidays included, and same-day emergency service is available.
A small drip can turn into a flooded garage or closet. These steps limit the damage until the source is found:
- Close the cold-water valve on the pipe into the heater if you can reach it safely.
- Gas heater: turn its gas control to off. Electric heater: switch off its breaker, but only if you can reach the panel without standing in water.
- Keep people and pets away from the water, and do not relight or switch the heater back on.
- Take photos of where the water appears and of the label with the model and serial number, then call our 24/7 emergency line.
What happens next
A straightforward service process
- 1
Tell us the fuel, the approximate age, the symptoms, and any error code, and send a photo of the label if you can.
- 2
We test the failed component and check the valves, venting, and connections around it.
- 3
You get the repair option and, when it makes sense, the replacement option, each with a written price before work begins.
- 4
We make the approved repair, then check temperature, operation, and every connection for leaks.
Common questions
Before you schedule
Is it worth repairing a 10-year-old water heater?
It can be, when the tank itself is sound and the failed part is a thermostat, element, igniter, or valve. ENERGY STAR advises considering replacement after 10 years, so we show you the condition of the tank and both options before you decide.
Why does my electric water heater have no hot water when the breaker is on?
The high-limit switch may have tripped, or an element or thermostat may have failed. If the high-limit trips again after a reset, something such as a stuck thermostat or a shorted element is causing it and needs testing.
Why does the pilot on my gas water heater keep going out?
A worn thermocouple or flame sensor, a dirty pilot assembly, a draft or venting problem, or a failing gas control can all put it out. If you smell gas, leave the building and call the gas utility instead of relighting it.
Can a leaking water heater be repaired?
That depends on where the water comes from. A leak at a fitting, connector, drain valve, or relief valve can be repaired. Water coming through the tank wall or bottom means the tank has failed and the heater needs replacing.
Do you repair tankless water heaters?
Yes. We diagnose gas and electric tankless units, including error codes, ignition faults, inlet filters, and scale in the heat exchanger. Rheem recommends tankless maintenance at least once a year, and more often with hard water.
Can I call about a leaking water heater at night or on a weekend?
Yes. A leak is an emergency, and our emergency line, 480-663-2255, answers 24/7, holidays included, with same-day emergency service. Close the cold-water valve and turn off the gas or the breaker first if you can do it safely.
Can you repair my water heater the same day?
Same-day repair service is often available, depending on the job. Have the fuel type, the model and serial number from the label, and any error code ready when you call or send the form.
What should I have ready when I call?
The fuel type, the approximate age, the model and serial number from the label, what the heater is doing, and whether it is leaking. A photo of the whole heater and its connections helps too.
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