Why your water heater has no hot water
No hot water almost always comes down to one of a handful of causes: a gas water heater's pilot light went out or its thermocouple failed, an electric water heater tripped its breaker or the reset button popped, or in either case a heating component, like a gas valve or an electric element, has actually failed. Which one you're dealing with depends on whether your water heater is gas or electric, so start there.
A few checks take five minutes and are safe to do yourself. If those don't fix it, or if you smell gas at any point, that is your signal to stop and call a plumber rather than keep troubleshooting.
Gas water heaters: pilot, thermocouple, and gas valve
Start by checking whether the pilot light is lit. Most modern gas water heaters have a small viewing window near the bottom where you can see the pilot flame. If it is out, the access panel usually has relighting instructions printed right on it, along with a control knob you turn to pilot before using the igniter button. Follow those instructions exactly, and if the pilot will not stay lit after a couple of tries, stop there.
A pilot that lights but will not stay lit usually points to a worn thermocouple. That is the small sensor that tells the gas valve the pilot is burning safely, and it degrades over years of heat cycling. It is a relatively inexpensive part to replace, but it is a job for a plumber since it involves the gas control assembly.
If the pilot lights and stays lit but you still have no hot water, or the burner will not fire on demand, the gas valve itself may be sticking or failing. This is not something to force or take apart yourself. A failed gas valve needs a plumber's diagnosis and replacement.
Electric water heaters: breaker, reset button, and elements
Check your electrical panel first. A tripped breaker for the water heater circuit is the single most common reason an electric unit suddenly stops heating. Switch it fully off and then back on, since a breaker that looks on can sometimes still be tripped.
If the breaker is fine, most electric water heaters have a red reset button, usually behind the upper access panel, that is part of the high-limit safety switch. It can trip if the water gets too hot or if a thermostat is misbehaving. You can press it once to reset, but if it trips again shortly after, do not keep resetting it. That is a sign something deeper, usually a failed thermostat or a shorted heating element, is causing the shutoff.
A water heater with two elements, upper and lower, can sometimes give you partial hot water, like a short lukewarm burst that runs out fast, when one element has failed but the other still works. That pattern is worth mentioning to the plumber, since it usually points them straight to which element or thermostat needs replacing.
When it's not the heater at all
If only one fixture has no hot water while the rest of the house is fine, the water heater is probably not the problem. That points instead to a failed mixing valve or shutoff at that fixture, which a plumber can address through toilet and faucet repair rather than a water heater visit. Mention which fixtures are affected when you call, since it changes where the plumber starts looking.
Stop troubleshooting and call if you see any of this
A gas smell is never something to investigate yourself. Leave the area, do not flip switches, and call your gas utility's emergency line before anything else. See our plumbing emergency guide for the full safety steps. Rust colored water or popping sounds from inside the tank usually mean sediment buildup or internal corrosion, which is a sign the tank itself may be near the end of its life rather than something a quick repair fixes.
- You smell gas anywhere near the water heater
- Water is actively leaking from the tank base, a fitting, or the T&P discharge line
- The reset button trips again right after you press it
- The pilot will not stay lit after a couple of careful attempts
- You see rust colored water or hear popping or rumbling from inside the tank
Would rather have a plumber look at it?
Call and describe what's happening. We'll connect you with an independent local plumber.
How a plumber decides repair versus replacement
For a tank under about ten years old with a single failed part, like a thermocouple, an element, or an igniter, repair is usually the rational call and those parts are typically stock items for common brands. A tank showing rust at the jacket base, a T&P valve that keeps tripping, or one that has already had a previous patch is a different story. At that point, replacement is often the more honest answer even if a repair is technically possible one more time.
In Everett, a house with older galvanized supply lines feeding the heater can be its own factor. A galvanized line feeding a brand new tank can sometimes fail not long after the tank goes in, so a plumber may flag that as something worth addressing at the same time rather than separately.
A note on permits
If a repair turns into a full water heater replacement, most jurisdictions in Snohomish County require a permit and inspection for the swap. Seismic strapping, a T&P discharge line, and an expansion tank where required by code are not optional add-ons. They are what keeps a future home inspection from flagging the work. Ask the plumber whether the job needs a permit and who is pulling it.
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Water Heater Repair & Replacement in Everett