AO Smith Water Heater Repair in Apex

No hot water usually means one of five things: a failed heating element, a tripped reset button, a bad thermostat, sediment buildup in the tank, or a pilot light that went out. The fix depends on whether you have a gas or electric water heater — and how old it is.

The 5 Most Likely Causes

1. Tripped Reset Button (Electric)

Electric water heaters have a red reset button on the upper thermostat, usually behind an access panel. If the water overheated, this safety switch trips. Press it once. If hot water returns within an hour, you're good. If it trips again within a few days, the thermostat or element is failing and needs to be replaced.

2. Failed Heating Element (Electric)

Electric tanks have two heating elements — upper and lower. The upper element heats incoming cold water first. If it fails, you get no hot water at all. If the lower element fails, you'll get a small amount of hot water that runs out fast. Elements cost $10-20 for the part, but replacing them requires draining the tank and working with electrical connections.

3. Pilot Light Out (Gas)

If you have a gas water heater and the pilot light went out, there's no flame to heat the water. Relighting instructions are on a sticker on the tank. Turn the gas knob to "pilot," hold down the button, and use the igniter (or a long lighter). Hold for 30-60 seconds after the flame appears. If the pilot won't stay lit, the thermocouple is likely bad — that's a $20 part but a repair best left to a pro since it involves the gas valve.

4. Sediment Buildup

Over time, minerals in your water settle at the bottom of the tank. This layer of sediment insulates the water from the burner (gas) or lower element (electric), making the unit work harder and longer to heat water. You might hear popping or rumbling sounds from the tank. Flushing the tank annually prevents this problem. If it's been years since your last flush, sediment may be severe enough that flushing alone won't fix it.

5. Bad Thermostat

The thermostat tells the elements (electric) or gas valve (gas) when to fire. If it fails, the heating cycle never starts. On electric units, you can test this with a multimeter. On gas units, a failed gas valve thermostat means no gas reaches the burner even when the pilot is lit.

Quick Troubleshooting Before You Call

Try these in order:

- Check the breaker (electric) or pilot light (gas) — this solves it about 25% of the time
- Press the red reset button if you have an electric tank
- Turn up the thermostat on the tank — someone may have bumped it. Factory setting is usually 120°F
- Check if other hot water fixtures work — if the kitchen has hot water but the bathroom doesn't, the problem might be a mixing valve or crossover, not the water heater
- Listen to the tank — popping sounds mean sediment, hissing means a leak, silence when it should be heating means an element or gas issue

If none of that works, Element Service Group offers a free plumbing inspection (an $89 value) and same-day water heater repair across the Triangle.

Repair vs. Replace: When Does It Make Sense?

Here's a straightforward way to think about it:

Repair makes sense when:

- The tank is less than 8-10 years old
- The issue is a single failed component (element, thermostat, thermocouple)
- There are no signs of tank corrosion or leaking
- Repair cost is under 50% of a new unit

Replacement makes sense when:

- The tank is 10-15+ years old
- You see rust-colored water from the hot side only
- The tank is leaking from the bottom (internal corrosion — not repairable)
- You're making repairs more than once a year
- You want to upgrade to a tankless or heat pump water heater for energy savings

A standard 50-gallon tank water heater lasts 8-12 years on average. Tankless units can last 20+ years with maintenance.

Wake County Water and Your Water Heater

Triangle water has moderate hardness — typically 3-7 grains per gallon depending on your municipality. That's not extreme, but over a decade it adds up. Sediment builds on heating elements and coats the bottom of tanks, cutting efficiency and shortening the unit's life.

A huge number of homes in the Triangle were built during the housing boom from the mid-90s through the 2000s. If your home falls in that window and you still have the original water heater, it's at or past its expected lifespan. It hasn't "failed" yet, but a proactive replacement on your schedule beats an emergency replacement when the tank finally gives out — usually at the worst possible time.

Our techs handle both repair and installation for tank, tankless, and heat pump water heaters. We serve Apex, Cary, Holly Springs, Fuquay-Varina, Raleigh, and Durham with same-day service and honest repair-vs-replace guidance.