Gas Water Heater Repair & Installation in Dallas, GA

Odd smells send many Dallas homeowners looking for gas water heater repair, and the first job is working out what kind of smell it is. A rotten-egg odor in the air, a sulfur smell that comes only from the hot tap and a burning or exhaust smell near the heater have very different causes, and one of them is an emergency.

If it smells like gas, leave first

Utilities add a sulfur-like odorant to natural gas so leaks can be noticed, and propane is odorized in a similar way. If you notice that odor in the air near the heater or anywhere in the house, do not try to decide whether it is the water. Get everyone outside, leave switches and plugs alone, light nothing, and call the gas utility or 911 from a safe distance. Stay out until the utility or fire department says the house is safe. A gas leak is not a water heater repair; once it is cleared, we can look at the heater and its connection.

Rotten-egg smell only from the hot water

When the smell appears only as hot water runs, and the cold water at the same faucet smells fine, the cause is usually inside the tank rather than in the gas line. Sulfate-reducing bacteria in the water can react with the anode rod, a sacrificial metal rod that protects the steel tank from corrosion, and give off hydrogen sulfide. It shows up more often with well water and in heaters that sit unused for stretches, such as in a second home or after a long trip.

Fixing a sulfur smell in hot water

• Replace the anode: swapping a magnesium rod for an aluminum-zinc or powered anode, where the manufacturer allows it, often reduces or stops the reaction.
• Flush and treat the tank: some manufacturers describe a treatment that kills bacteria in the tank, and their instructions should be followed exactly.
• Look at the water source: if the cold water smells as well, the trouble is in the supply, and treatment belongs ahead of the heater.

Pulling the anode rod out entirely may stop the smell but leaves the tank unprotected and can affect the manufacturer's warranty, so we do not recommend it.

Burning, exhaust or hot-metal smells

A faint burning smell for a short time after a new heater first fires is often dust or factory residue burning off the burner. A sharp, stinging exhaust smell that returns whenever the burner runs suggests that combustion gases are spilling instead of venting; turn the gas control off and air out the space until the heater is checked. If a carbon monoxide alarm goes off, leave the house and call 911. A melting-plastic smell near the top of the tank can come from heat spilling at the draft hood onto nearby plastic pipe or wiring. Scorch marks below the burner access door point to flames rolling out of the combustion chamber, a serious symptom that should never be reset and forgotten.

How we track down the source

We begin by confirming whether the odor is in the air, in the hot water or both. For water odors, we compare hot and cold at several fixtures, examine the anode and ask about the water source and how often the heater is used. For combustion smells, we inspect the burner and combustion chamber, test for spillage at the draft hood and follow the vent to the outdoors. If the heater is near the end of its life, replacement may be the better answer: an electric water heater sidesteps combustion altogether, a tankless water heater trades the tank for on-demand heating, and our Georgia water heater overview fills in the details.

Dallas permits and inspections

Dallas's Community Development Department issues residential plumbing permits and asks applicants to confirm first that the address lies inside city limits. The city's building inspections page explains how inspections are requested. When a replacement needs that permit, we file it and line up the inspection.

Questions about water heater smells in Dallas

Can I replace the anode rod myself?

Some homeowners do, but it is harder than it looks. The gas control goes to off, the cold supply is closed, pressure is relieved and some water drained, and the rod is often seized tight in the top of the tank. A rigid rod needs headroom above the heater, while a segmented one fits under a low ceiling. Check the manual for the anode types the manufacturer allows before buying one.

Why does the smell come back after we return from a trip?

Water that sits warm and still in a tank gives bacteria time to multiply and react with the anode rod, so the first hot water drawn after a trip often smells strongest. Running the hot taps for a few minutes may clear it. If the odor keeps returning, an anode change or a tank treatment is the longer-term fix.

Does a new anode rod fix every sulfur smell?

Not every one. It solves the most common cause, a reaction between bacteria and a magnesium rod, but if the cold water smells too, the source lies in the water supply itself. Very heavy bacterial growth may also need a tank treatment along with the new rod. We compare hot and cold water before recommending a part.

Pin down the smell

Not sure what that smell around your Dallas water heater is? If it could be gas, get outside and call the utility first; for water odors and everything else, reach Alpha Plumbing and Sewer at (404) 409-4448.