Water Heater Repair and Replacement in Des Plaines
A tank water heater gives you two kinds of warning. The small kind — lukewarm water, rumbling, a recovery time that keeps getting longer — means the unit needs attention. The loud kind is water on the floor around the base, and that one means the tank itself is done. We diagnose which you are dealing with and repair what is repairable, but we will not pretend a leaking tank can be patched.
Tell us what the system is doing when you call — that decides which truck and which parts head to your address.
Repair, replacement and knowing the difference
Most no-hot-water calls are component failures, and components are repairable. On a gas unit the usual suspects are the thermocouple or flame sensor, the gas control valve, a dirty burner or a failed igniter. On an electric unit it is typically a burned-out upper or lower heating element or a thermostat. None of these requires a new water heater, and we will tell you plainly when a repair is the right spend.
Replacement becomes the honest answer when the tank itself fails, when the unit is at or past the age where parts failures start stacking up, or when the glass lining has broken down and rust is showing in the hot water. A ten- or twelve-year-old tank with a failed gas valve can be a judgment call; the same tank leaking at the base is not.
Age is easy to check. The serial number on the rating plate encodes the manufacture date, and we read it on every visit so the repair-versus-replace conversation starts from facts rather than guessing.
Gas vs electric, and sizing the tank to the household
Gas units cost more to install but recover faster — a 40- or 50-gallon gas tank re-heats a full load of water in roughly half an hour, which is why they suit families running back-to-back showers and laundry. Electric units are simpler, cheaper to install and a reasonable choice where gas is not available or where the venting a gas unit needs would be expensive to add. Both come down to the same question: how much hot water the household draws in its busiest hour.
Sizing is where replacement jobs go wrong. An undersized tank runs out of hot water at the worst time; an oversized one heats water nobody uses, all day, every day. We size off the first-hour rating — how much hot water the unit delivers in an hour of continuous use — matched against the household's actual peak demand, not just whatever size the old tank happened to be.
Chicagoland water is hard, and hard water is the quiet killer of tank water heaters. Minerals settle out of the water as it heats and bake into a layer of sediment on the bottom of the tank. That layer insulates the water from the burner, forces the tank to run longer, causes the rumbling and popping sounds people hear, and overheats the tank bottom until the glass lining cracks. Flushing the tank annually slows it; ignoring it for a decade is how an eight-year-old tank dies early.
Leaking tanks, and why leaking is never a repair
A puddle around the water heater has exactly two sources, and they are not equal. Water from the temperature-and-pressure relief valve, a loose fitting, a flex connector or the drain valve is a plumbing repair — the component is replaced and the tank goes back to work. Water seeping from the tank body itself, or rust trails running down from under the jacket, means the steel tank has corroded through. That is the end of the unit.
There is no legitimate repair for a leaking tank. The glass lining inside has failed, the steel is corroding from the inside out, and no sealant, patch or weld restores that. A tank that has started to leak does not get better, and the failure mode is not gradual forever — a corroded tank can go from a slow seep to a full rupture, which is forty to fifty gallons of water released into the basement at once. If your tank is leaking, treat it as a replacement decision with a clock on it, and if it is on an upper floor or near finished space, shut the cold supply valve above the heater and call.
If your unit is only leaking from a fitting or valve, we will fix the fitting or valve. The camera inspection logic from drain work applies here too: the recommendation should match what is actually in front of us, not the most expensive option available.
Installation, warranty and the tankless alternative
A proper installation is more than swapping tanks. Water heater replacement is permitted work in local municipalities, the gas piping, venting and expansion tank have to meet current code rather than the code the old unit was installed under, and the work is inspected. We pull the permit, set the new unit, bring the venting and connections up to current requirements, and haul the old tank away.
Warranty on a new water heater has two parts that are worth understanding separately. The manufacturer warranties the tank and parts for a set term that varies by model. Our own workmanship warranty covers the installation labor side. When we quote a replacement we tell you both terms in writing so you know exactly what is covered and for how long.
Tank water heaters are the right answer for most households, but they are not the only answer. A tankless unit heats water on demand instead of storing it, never runs out mid-shower, and takes up a fraction of the space — at a higher installation cost and with its own maintenance needs. If you are replacing a tank anyway and are curious whether tankless fits your household, our tankless water heater page covers the trade-offs in detail, and we install both.
Qualifying installations may include our lifetime product, labor and parts warranty program; terms and eligibility apply.
Where we do this work
We work from 2093 Rand Rd, Des Plaines, IL 60016 and cover Cook and DuPage county communities plus Chicago. Every community is listed on our service areas page, or start with one of these:
Questions we are asked about this service
Can a leaking water heater tank be repaired?
No. A leak from the tank body itself means the glass lining has failed and the steel has corroded through, and there is no lasting repair for that. Leaks from fittings, the drain valve or the relief valve are repairable — it is worth having the source identified, but water seeping from the tank means replacement.
How do I know if my water heater is failing?
The common signs are water that does not get as hot or runs out faster than it used to, rumbling or popping sounds from sediment baked onto the tank bottom, rusty or discolored hot water, moisture or rust trails around the base, and an age past ten years. Any one of those is worth a look; rust in the water or moisture at the base should not wait.
Should I repair or replace my water heater?
Component failures — a thermocouple, element, thermostat or gas valve — are usually worth repairing on a younger tank. Replacement makes more sense when the tank is leaking, when the unit is at or past its expected life, or when repairs are starting to stack up. We read the manufacture date off the serial plate and give you the honest call.
What size water heater does my household need?
It depends on your peak-hour demand — how much hot water the household draws in its busiest hour — matched against the unit's first-hour rating, not just the gallon size. Gas units recover faster than electric ones of the same size. We size the replacement off your actual usage rather than copying whatever was installed before.
Gas or electric — which is better?
Gas costs more to install but heats faster and recovers quickly, which suits larger households. Electric is simpler and cheaper to install and is the practical choice where gas or proper venting is not available. Operating cost depends on local utility rates. We install both and will lay out the trade-offs for your situation.
Should I consider a tankless water heater instead?
Possibly, if endless hot water, space savings or a longer service life matter to you and the higher installation cost fits the budget. Tankless units also need periodic descaling in our hard-water area. A conventional tank remains the lower-cost, straightforward choice for most homes. Our tankless page covers the comparison in detail.
What warranty comes with a new water heater?
Two separate ones: the manufacturer's warranty on the tank and parts, which varies by model, and our workmanship warranty on the installation labor. Both terms are provided in writing with the quote.
Related services
Guides worth reading
Every article is on our plumbing and HVAC guides page.
Schedule this service
Call 847-550-3322 for Des Plaines and the suburbs, or 773-250-6060 in Chicago. You can also request service online.