Hot Water Gone Lukewarm? Start With the Scale.
The City of Chandler reports water hardness from 5 to 20 grains per gallon, averaging 16.5. Heat pulls those minerals out of the water, and in a water heater they have nowhere to go.
In a tank, they settle on the bottom as sediment. The burner or lower element has to heat through that layer first, so the heater runs longer, recovers slower and starts to pop or rumble. In a tankless unit, scale lines the heat exchanger until the unit throws flow or overheat codes.
Chandler's FAQ recommends flushing the water heater once a year if you have a softener. Without one, sediment builds faster, and a heater that has never been flushed may be past the point where a flush helps.
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What We Check on the First Visit
Most no-heat and low-heat calls trace back to one of a handful of parts:
- Gas units: igniter or pilot assembly, thermocouple or flame sensor, gas valve, and venting
- Electric units: upper and lower elements (often crusted with scale) and thermostats
- Temperature and pressure relief valve: dripping because it failed, or because house pressure is too high
- Tankless units: inlet filter screen, scale in the heat exchanger, and the error code history
- The tank itself: moisture or rust at the base, which no repair fixes
Our $99 service call covers the diagnosis and an upfront price before any work starts, and it goes toward the repair if you go ahead.
Worth Fixing, or Time to Replace?
The U.S. Department of Energy puts the typical life of a tank water heater at 10 to 15 years and a tankless unit at about 20. U.S. Census data shows roughly three in four Chandler homes were built between 1980 and 2009, so plenty of garages still hold a heater that is at or past that range.
A failed part on a sound heater is usually worth repairing. A leaking tank, or an old heater needing its second or third major repair, usually is not. If it is time, see water heater replacement in Chandler for tank vs. tankless and the city's permit rules.