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Water Heater FAQs

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Water Heater FAQs

Straight answers to the questions Plainfield homeowners ask most about their water heaters.

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Common Water Heater Questions, Answered

Woke up to a cold shower, or wondering if your aging tank is worth fixing? We've handled water heater repairs, maintenance, and replacements across Plainfield, IL for over 20 years, and these are the questions we hear every week. Not covered here? Call (815) 609-3150, 24 hours a day, every day of the year.

Why isn't my water heater producing hot water?

On gas units: usually a faulty pilot light, a worn thermocouple or a failing gas control valve. On electric: a burned-out heating element or a tripped breaker, so check your panel first. Before replacing parts, have a licensed plumber diagnose it so you don't pay for the wrong fix. Book a check through our hot water heater maintenance service.

How long do water heaters typically last?

Tank units last 8 to 12 years; tankless can reach 20 with annual maintenance. Water quality, usage and regular flushing matter most. Plainfield's hard water speeds up sediment buildup and shortens tank life. Past 10 years and acting up? An inspection tells you repair or replace.

Warning Signs

Signs your water heater may need replacing

Rust-colored water

The tank interior is corroding. Once the lining goes, the tank isn't far behind.

Banging or rumbling sounds

Popping, rumbling or banging is sediment: steam bubbles pushing through mineral deposits. It cuts efficiency and can crack the tank lining. A flush often fixes it; in a corroded older unit, replace.

Pooling water at the base

A loose fitting, or a tank that has started to fail.

Running out of hot water faster

It's losing capacity, often from sediment or a failing element.

Rising energy bills

A heater working harder shows up on your utility bill first.

Age past 10 years

Tank units at or past the 10-year mark deserve a professional look, even if nothing seems wrong.

Tank vs. Tankless

What's the difference between tank and tankless water heaters?

Tank heaters keep 30 to 50 gallons hot around the clock. Tankless units heat water only when a tap opens, so there's no standby heat loss. According to the U.S. Department of Energy, tankless heaters are 24% to 34% more energy efficient for households using 41 gallons or less of hot water a day. They cost more to install but last nearly twice as long. With several showers, laundry and a dishwasher running at once, sizing matters more than the type. We'll go over both in a free consultation, or see our water tank installation page.
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How often should I flush my water heater?

Once a year. Sediment on the tank bottom insulates the water from the heating element, so the unit works harder and wears out sooner. With Plainfield's hard water, some homes benefit from every six months. Our hot water heater maintenance service includes a full flush and inspection.

Sizing Guide

What size water heater does my home need?

Too small runs out of hot water; too big wastes energy every idle hour.

1 to 2 person household

A 30-gallon tank is usually enough.

3 to 4 person household

Most families of four need 40 to 50 gallons.

5+ person household

A 50- to 80-gallon tank, two units, or a tankless system sized by flow rate.

Tankless sizing

Sized by gallons per minute (GPM), based on how many fixtures may run at once.

Can a water heater be repaired instead of replaced?

Often, if the unit is under 10 years old and the tank is sound. Heating elements, thermostats, pressure relief valves and igniters cost a fraction of a replacement. A tank leaking from corrosion can't be repaired long term; the metal has failed. We'll give you both options and what each costs.

Is a leaking water heater dangerous?

Yes. A leak from tank corrosion or a failing pressure relief valve can cause structural water damage, mold and, in some setups, electrical hazards. Even a slow drip deserves a same-day look. See water around the base? Call (815) 609-3150. We're available around the clock.

Efficiency

How to make your water heater more energy efficient

Insulate the tank and pipes

Insulate an older tank with a blanket and exposed hot water pipes with foam sleeves, especially in unheated utility rooms.

Schedule annual maintenance

A yearly flush and inspection. A sediment-caked tank uses significantly more energy than a clean one.

Upgrade to ENERGY STAR® certified equipment

ENERGY STAR® certified water heaters use up to 10% less energy than standard models; tankless does better for lower-demand homes.

What temperature should I set my water heater to?

120°F. It prevents scalding, slows mineral buildup and cuts standby heat loss. Above 140°F raises the burn risk for young children and elderly residents and speeds corrosion. A thermostat that's hard to read or stuck high needs fixing; our thermostat repair and thermostat replacement services cover water heater controls too.

Call Leto Before You Buy a New Unit

24 years serving Plainfield and Chicagoland. 24/7 emergency service available.

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24/7 emergency service (815) 609-3150
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By submitting this form you agree that we may contact you about your request and share your name and email address with partner companies for email marketing. We never share your mobile number or text message consent with third parties or affiliates for marketing or promotional purposes.