Gas Water Heater Repair & Installation in Acworth, GA

A pilot light that lights, flickers and dies again is one of the most common reasons Acworth homeowners call about gas water heater repair. The result is always the same cold shower, but the pilot assembly, the gas control valve, the burner's air supply and even the vent can each be behind it, and each one has a different fix.

How a standing pilot holds the gas valve open

Many tank-type gas heaters still use a standing pilot with a thermocouple, a slim metal probe that sits in the pilot flame. Heat makes the probe produce a tiny electrical current, and that current keeps a magnet inside the gas control valve open. When the probe stops producing enough current, the valve shuts the gas off as a safety measure and the pilot dies. Some models use a thermopile instead, which works on the same principle but makes more power and also runs the control.

What the pilot is telling you

• It lights while you hold the button down but goes out the moment you let go.
• It stays lit for hours or days, then quits again with no obvious pattern.
• The flame looks small, yellow or wavering instead of a steady blue that wraps the tip of the probe.
• It stays lit, yet the main burner never fires and the water stays lukewarm.

Write down which of these you see. That one detail narrows the search before anyone opens the burner compartment.

Likely causes, from simple to serious

A worn thermocouple is the usual suspect when the pilot dies on release, and replacing it is a modest repair. A weak, yellow pilot often points to a partly blocked pilot tube or orifice, which can be cleaned or replaced. On heaters built with a sealed combustion chamber, the air intake screen near the base can clog with dust or lint and starve both flames; the screen needs cleaning, and the space around the heater may need better airflow. If those parts check out, the gas control valve itself may be failing, and on an older tank the cost of a new valve is a good reason to weigh replacement instead.

Repeated outages can also come from a draft problem, where exhaust is not leaving through the vent and the flame is short of fresh air. That one should never be ignored, because combustion gases are meant to go outdoors.

Safety before you try to relight

Relighting by following the instructions printed on the heater is reasonable once or twice. A gas smell at any point ends the attempt: do not strike a match or touch a switch, take everyone outdoors, and make the call to the gas utility or 911 once you are clear of the house. A pilot that keeps going out after a careful relight is a reason to have the heater checked, not to keep pressing the button.

Repair the controls or replace the heater

When the tank is dry and sound, a pilot or ignition repair usually makes sense. When the tank is rusting at the base, weeping at a fitting or near the end of its normal life, putting a new control valve on it rarely pays off. If you decide to replace, we confirm that the venting, gas connection and relief valve discharge suit the new model. Some households use the replacement to move to a tankless water heater or an electric water heater instead, and our guide to water heater types in Georgia lays out the differences.

Permits for a replacement in Acworth

Residential plumbing permits in Acworth come from the city's Development Department, and its residential plumbing permit application notes that fees go up when work begins before a permit is issued. A pilot repair rarely raises the question, but a replacement can, so we settle it before the old heater is disconnected.

Pilot light questions from Acworth homeowners

Can I replace the thermocouple myself?

Some homeowners do, but the part has to match the gas valve, the tip must sit squarely in the pilot flame, and the nut at the valve should be snug without being overtightened. If the pilot still fails with a new thermocouple, the trouble lies elsewhere, often in the pilot tube, the air supply or the valve. Leave soot to a plumber, and if you ever smell gas, skip the repair entirely: get outside and call the gas utility or 911.

Why does my pilot go out on windy days?

Wind blowing down the vent can push air back toward the burner and snuff out a small pilot flame. A damaged or missing vent cap, a short vent run or a loose connection at the draft hood makes it more likely. We follow the vent from the heater to the roof or chimney and recommend a fix to the cap or connector instead of simply relighting.

What should I have ready before the visit?

Note the brand, model and serial number from the label on the tank, roughly how old the heater is, and exactly what the pilot does when you try to light it. Clear a path to the heater and the floor around its base. If the heater sits in a closet, attic or crawlspace, tell us so access can be planned ahead of time.

When the pilot will not cooperate

If the pilot in your Acworth home keeps quitting, call Alpha Plumbing and Sewer at (404) 409-4448 and describe what the flame does; that detail tells us where to start.