Water Heater Repair in Los Angeles

On an older standing-pilot tank heater the usual culprit is a failing thermocouple. It is a probe sitting in the pilot flame that generates a small millivolt signal telling the gas valve the flame is lit, and when it weakens the valve shuts. We test its output with a meter. On a newer sealed-combustion unit, repeated outages often trace to an air intake screen blocked with lint.

Find where the water is actually coming from before assuming the worst. Drips from the drain valve, the T&P discharge pipe, or the cold and hot connections are all repairable. Water seeping from the seam or the bottom of the tank means the glass lining has failed and the steel has corroded through, which cannot be repaired. Shut the cold inlet and the gas or breaker, then call.

Most residential gas tanks last 8 to 12 years. The build date is coded into the serial number on the rating plate, usually the first four digits as year and week. Once a unit is past ten years and needs a gas valve or a new tank fitting, the repair often costs a meaningful share of a replacement. We read the plate and tell you where yours sits.

That is sediment. Calcium and magnesium settle out of hard water onto the tank floor, water gets trapped beneath the layer, and it flashes to steam under the burner. Beyond the noise, the sediment insulates the burner from the water and drives gas use up. We drain and flush the tank, and where buildup is heavy we break it up through the drain opening.

That is the temperature and pressure relief valve, and it is a safety device rather than a nuisance. It opens near 150 psi or 210 degrees. Dripping usually means the thermostat is set too high, house pressure exceeds the 80 psi the plumbing code allows, or a check valve has created a closed system that needs a thermal expansion tank. Never cap or plug that discharge line.

It is a magnesium or aluminum rod threaded into the top of the tank that corrodes on purpose so the steel tank does not. Once it is consumed down to the bare wire core, the tank itself starts rusting. We pull and inspect it, typically every three to five years, and replacing it is one of the few repairs that measurably extends a tank's usable life.

A repair generally does not require one. A replacement does. LADBS requires a plumbing permit to replace a gas water heater in a single family dwelling in the City of Los Angeles, with a narrow exception for contractors holding LADBS Certified Licensed Contractor registration installing an equivalent unit. Unincorporated LA County and Santa Cruz County pull permits through their own departments.

California Health and Safety Code section 19211 requires all new, replacement, and existing residential water heaters to be braced, anchored, or strapped against earthquake movement, and the seller must certify compliance when a home changes hands. The accepted standard is two straps, one in the upper third and one in the lower third of the tank, with the lower strap kept clear of the controls.

Three usual causes. Sediment takes up volume at the bottom of the tank, so there is less usable hot water. A broken dip tube lets incoming cold mix straight into the top of the tank instead of the bottom. Or on an electric unit the lower element has failed, leaving only the top third heated. We check temperature stratification and flush before recommending anything.

That is usually sulfate-reducing bacteria reacting with the magnesium anode rod and producing hydrogen sulfide. It is a plumbing issue, not a gas leak, and it shows only on the hot side. The fix is typically swapping the magnesium rod for an aluminum-zinc rod and chlorinating the tank. If you smell sulfur when no water is running, leave the building and call the gas utility.

We will not put a number on it before diagnosis. The variables are which component failed, whether the part is still stocked for your make and model, access to the unit, and whether the failure exposed a related problem like excess house pressure or a missing expansion tank. We diagnose first, tell you whether repair or replacement is the better spend, then price it in writing.

On a standard unit with a lighting label, relighting once is reasonable if you follow the instructions printed on the tank exactly. If it will not stay lit, or it goes out again within days, stop. Repeated pilot outages point to a thermocouple, a gas valve, or a venting fault, and venting faults can spill combustion products into the house. Do not pull the burner assembly.