Water Heater Repair

The Bay Area's hard water is a water heater's worst enemy. Sediment buildup from calcium and magnesium deposits accumulates at the bottom of tank water heaters, creating a insulating layer between the burner and the water it's trying to heat. The result: longer recovery times, higher gas bills, and the telltale popping or rumbling sound that Bay Area homeowners describe as their water heater "boiling." In Milpitas, Fremont, and East San Jose — where water hardness is most aggressive — we recommend flushing tank water heaters annually rather than the standard every-2-years guideline. Tankless water heaters are increasingly popular in Bay Area homes, and for good reason — they save space and deliver endless hot water. But they're not maintenance-free, especially in our hard water conditions. Rinnai, Navien, and Noritz tankless units all require annual descaling (vinegar flush) to prevent heat exchanger damage. We've seen Bay Area tankless heaters fail catastrophically at 5-6 years — half their expected lifespan — because they were never descaled. The repair cost for a damaged heat exchanger ($800-$1,200) far exceeds the $150 annual maintenance cost. Water heater diagnostic checklist: ✓ No hot water (gas tank) → check pilot light; if it's out, the thermocouple may need replacement. ✓ No hot water (electric tank) → test the reset button on the upper thermostat; if it trips again, the element or thermostat is failing. ✓ Not enough hot water → sediment buildup reducing tank capacity, or a failing dip tube sending cold water to the hot outlet. ✓ Tank leaking from bottom → likely internal corrosion; if the tank itself is leaking (not the drain valve or fittings), replacement is usually necessary. ✓ Tankless error code → note the code and call us; most common codes relate to ignition failure, flame sensor, or flow rate issues. ✓ Rotten egg smell in hot water → depleted anode rod allowing sulfur bacteria to thrive; we'll replace the anode and flush the tank.