Tankless or Tank Water Heater Not Working?

Tankless or Tank Water Heater Not Working? 17 Easy Fixes Raleigh Homeowners Can Try

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If your water heater suddenly stopped delivering hot water—or your Tankless or Tank Water Heater Not Working?—there are a handful of simple, quick checks you can perform in minutes. Below are fast, safe steps Raleigh, Cary, Garner, and Apex homeowners can try on both tankless and tank (storage) water heaters. If you smell gas, see scorch marks, or the tank body is leaking, stop and call a professional immediately.

Fast fixes for tankless water heaters

  1. Confirm power & gas
  2. Check the dedicated breaker/GFCI and the unit’s service switch. For gas, make sure the valve is fully open (handle parallel to the pipe) and your LP tank isn’t empty.
  3. Cycle power / clear lockout
  4. Turn the unit OFF for 30 seconds, then ON. Many controllers clear minor ignition errors after outages.
  5. Open the tap more
  6. Tankless models need a minimum flow to fire. Open the hot tap farther or switch to a higher-flow fixture for testing.
  7. Set the temperature to ~120°F
  8. Too low a setpoint + a mixing valve can feel lukewarm. Start at 120°F.
  9. Clean the inlet water filter screen
  10. There’s a small strainer where the cold line enters the unit. Shut water off at the isolation valves, pop the screen out, rinse, reinstall.
  11. Clean faucet/shower aerators
  12. Sediment reduces hot-side flow and can prevent firing. Rinse aerators and showerheads.
  13. Check intake/exhaust & condensate
  14. Clear leaves, lint, or snow at the vent/intake. Make sure the condensate hose drains freely (no kinks).
  15. Winter hiccups?
  16. Thaw/insulate exterior lines. Built-in freeze protection requires power—don’t shut off power during hard freezes.

When to call Poole’s for tankless: Persistent error codes, burner lights that die repeatedly, scale buildup requiring descaling (we handle this quickly), or any gas/venting concern.

Fast fixes for tank (storage) water heaters

  1. Electric: reset power
  2. Flip the breaker fully OFF/ON. With power OFF, press the high-limit reset (red button) behind the upper panel/insulation. If it trips again, call us.
  3. Gas: relight the pilot
  4. Verify the gas valve is ON. Follow the lighting instructions on your tank’s label. If the pilot won’t stay lit, stop and call.
  5. Set to ~120°F
  6. On many dials A/B/C ≈ 120–140°F. Start at ~120°F for safety & efficiency.
  7. Partial sediment flush (2–3 minutes)
  8. Attach a water hose to the drain valve and open it briefly to purge the sediment, then close it. Full flushes are great but this quick purge often restores performance.
  9. Open top valves fully
  10. Ensure the cold inlet and hot outlet valves at the top of the tank are fully open.
  11. Fix “runs out fast”
  12. Besides sediment, a mis-set mixing/anti-scald shower valve can blend too cold. Adjust the shower trim per the manufacturer’s directions.
  13. Noisy rumbling
  14. Usually sediment. Do a partial flush above; schedule a full service if noise persists.
  15. Rotten-egg odor (hot side)
  16. Temporarily raise the temperature to 140°F for a few hours, then return to 120°F and run hot water. Persistent odor typically needs anode/disinfection service.
  17. T&P valve dripping
  18. Never cap it. Occasional drips point to thermal expansion; continuous flow needs professional diagnosis ASAP.

Quick 5-step diagnosis (both types)

  1. Power/Gas: Breaker on, service switch on; gas valve open / LP not empty.
  2. Controls: Temp ~120°F; clear error/reset; any remote/controller powered.
  3. Water movement: Open tap further; clean aerators; clean tankless inlet screen.
  4. Restrictions: Check vent/intake, condensate (tankless), and do a short sediment flush (tank).
  5. Re-test a single fixture: Single-handle showers can mislead—verify at a simple sink first.

When to stop and call a pro immediately

  • You smell gas, see soot/scorching, or the tank body leaks
  • The breaker trips repeatedly or you see melted wiring/terminals
  • The T&P valve won’t stop discharging
  • Error codes persist after a reset, or there’s no improvement after the steps above

Did you know? At Poole’s Plumbing, we offer same-day water-heater service across Raleigh, Cary, Apex, Garner, and Wake County—plus our Best Price in Town guarantee on new and replacement water heaters.

Call now: 919-661-6334

Tankless or Tank Water Heater Not Working?

Why Raleigh homeowners trust Poole’s for water-heater service

  • Best Price in Town—Guaranteed on all new and replacement water heaters
  • Tankless specialists: Descale, diagnostics, and high-efficiency installs
  • Up-front pricing & options: Repair vs. replace clarity before work begins
  • Local + fast: Serving Wake County for decades with same-day availability

Pro maintenance that pays off

  • Annual tankless service (inlet screen, descaling, condensate check) extends lifespan and keeps warranty valid
  • Annual tank flush reduces energy use and noise
  • Anode inspection on tank models prevents premature tank failure
  • Expansion tank & PRV check protects fixtures and the T&P valve

Local service areas

Raleigh • Cary • Apex • Garner • Holly Springs • Fuquay-Varina • Clayton • Morrisville • Knightdale • Wake Forest • Rolesville • Zebulon

FAQs

How do I know if I should repair or replace my water heater?
Age and tank condition tell the story. Tanks >10–12 years with rust or leaks usually warrant replacement. Tankless units often last longer with regular service. We’ll show you both options on site.

Is 140°F better than 120°F?
120°F is safer and efficient for most homes. 140°F can help with odor/bacteria concerns temporarily, but consider mixing valves and professional disinfection for persistent issues.

Why does my tankless go hot-cold-hot (“cold sandwich”)?
Minimum flow, inlet screen debris, or a shower mixing valve set too cool. Clean screens/aerators and confirm setpoint; if it persists, we’ll test sensors and scale.

Can I descale a tankless myself?
With service valves and the right pump/solution, yes—many homeowners can. If you’re unsure or see error codes, schedule a professional descale.

The Ultimate guide to finding the right water heater

The Ultimate Guide to Finding the Right Water Heater

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How do we find the best water heater? As professionals, we have spent countless hours in basements, closets, and garages, staring down every type of water heater imaginable. We have seen the good, the bad, and the truly ancient. The one thing that always strikes me is how little thought most people give to this essential appliance—until it breaks down, that is. A sudden cold shower is a powerful motivator.

The Ultimate Guide to Finding the Right Water Heater. Choosing a new water heater isn’t just about getting the hot water flowing again. It’s a significant decision that impacts your home’s comfort, your energy bills, and your daily routine for the next decade or more. This guide is built from years of on-the-job experience to help you navigate the options and make a choice you’ll be happy with for years to come.

Understanding Your Water Heater Options

The first step is knowing what’s on the market. The world of water heaters has expanded far beyond the big metal tank you have in mind. Each type has its own set of pros and cons, and the right one for you depends entirely on your home and lifestyle.

The Traditional Storage Tank Water Heater

This is the workhorse you’re most familiar with. It features an insulated tank that holds and heats a specific amount of water (typically 30 to 80 gallons), keeping it ready for use when needed.

  1. How it works: A gas burner at the bottom or electric heating elements inside the tank heat the water. As you use hot water, cold water enters the bottom of the tank to be heated.
  2. Best for: Homes with simultaneous hot water demands (such as multiple showers running at once) and those seeking a lower upfront cost.
  3. A Plumber’s Insight: These units are reliable and relatively inexpensive to install, especially if you’re replacing a similar model. However, they suffer from “standby heat loss,” meaning they constantly use energy to maintain the stored water’s temperature, even when it is not in use.

The On-Demand Tankless Water Heater

Tankless water heaters, also known as on-demand heaters, are a modern alternative that heats water only when needed.

  1. How it works: When you turn on a hot water tap, cold water flows through the unit. A powerful gas burner or electric element ignites and instantly heats the water as it passes through.
  2. Best for: Households that want to save on energy costs and never run out of hot water. They are also great for homes with limited space.
  3. A Plumber’s Insight: The endless supply of hot water is a huge plus. But be aware of the flow rate. A unit that’s too small may struggle to supply hot water to both a shower and a dishwasher simultaneously. Additionally, gas models often necessitate larger gas lines and specialized venting, which can increase the installation cost.

The High-Efficiency Heat Pump (Hybrid) Water Heater

A heat pump water heater is a savvy choice that combines storage tank technology with an innovative heating method. It doesn’t create heat directly; it moves it.

  1. How it works: It pulls heat from the surrounding air and transfers it to the water in the tank. Think of it as a refrigerator working in reverse.
  2. Best suited for Homeowners in moderate to warm climates who prioritize maximum energy efficiency.
  3. A Plumber’s Insight: These are incredibly efficient—often 2-3 times more than a standard electric tank. They require a good amount of space (at least 1,000 cubic feet of air space around them) and a nearby drain for condensate. They also make a bit of noise, similar to a dehumidifier.

The Eco-Friendly Solar Water Heater

Solar water heaters utilize the sun’s energy to heat water, making them the most environmentally friendly option available.

  1. How it works: Collectors on your roof absorb solar energy. This energy heats a fluid that circulates to a storage tank, transferring its heat to your water supply.
  2. Best for: Environmentally conscious homeowners in sunny climates.
  3. A Plumber’s Insight: The upfront cost is the highest of any type, but federal and state incentives can help offset it. You’ll also need a conventional backup system (either integrated or as a separate tank) for cloudy days or periods of high demand.
Water Heater Replacement

Key Factors to Consider Before You Buy

Once you have a sense of which type might suit you, it’s time to drill down into the specifics. Rushing this step is a common mistake that leads to buyer’s remorse.

1. Sizing: Getting it Just Right

Size is the most critical factor. Too small, and you’ll have lukewarm showers. Too big, and you’re paying to heat water you don’t need.

  1. For tank heaters, sizing is based on the “First Hour Rating” (FHR). This number indicates the maximum amount of hot water the unit can produce in one hour of high usage. A family of four typically needs a gas heater with an FHR of 65-75 gallons or an electric one with a similar rating.
  2. For tankless heaters, sizing is based on the flow rate (gallons per minute, or GPM) required at peak times and the necessary temperature rise (the difference between the incoming cold water temperature and your desired output temperature). Add up the GPM of the fixtures you might use simultaneously to find your magic number.

2. Energy Efficiency: Saving Money in the Long Run

A water heater’s efficiency is measured by its Uniform Energy Factor (UEF). The higher the UEF, the more efficient the unit. A higher UEF might mean a higher purchase price, but it will translate into lower monthly utility bills. Always check the yellow EnergyGuide label on the unit to compare annual operating costs.

3. Cost: Upfront vs. Lifetime

Pro Tips for Maintenance and Longevity: Ultimate Guide to Finding the Right Water Heater.

Don’t just look at the sticker price. Consider the total cost of ownership, which encompasses the purchase price, installation costs, and ongoing energy expenses throughout the product’s lifetime.

  1. Storage Tank: Lowest upfront cost, higher long-term energy cost.
  2. Tankless: Higher upfront cost, lower long-term energy cost.
  3. Heat Pump: Although it has a high upfront cost, it offers the lowest long-term energy costs for electric models.
  4. Solar: Highest upfront cost, virtually non-existent energy cost.

4. Installation Requirements

From a plumber’s perspective, this is where things can get tricky. Replacing a 50-gallon gas tank with another is a straightforward process. Switching from an electric tank to a gas tankless unit, however, involves running new gas lines, new plumbing, and new venting—a much more complex and expensive job. Always factor in the cost of professional installation.

Your water heater is an investment. Protect it with simple, regular maintenance.

  1. Flush the Tank: For tank-style heaters, drain a few gallons from the tank every 6 to 12 months. This removes sediment that can reduce efficiency and cause corrosion in the tank.
  2. Check the Anode Rod: This is a “sacrificial” rod inside your tank that attracts corrosive elements. It should be checked every 2-3 years and replaced if it’s heavily corroded. This single step can double the life of your tank.
  3. Test the T&P Valve: The temperature and pressure relief valve is a critical safety feature. Test it annually by lifting the lever. Water should flow out. If it doesn’t, it needs to be replaced immediately.
  4. Descale Tankless Units: If you have hard water, your tankless unit requires annual descaling to prevent mineral buildup from clogging the heat exchanger.
Professional Water Heater Installers of the Raleigh, North Carolina

When in Doubt, Call a Professional

This guide gives you a solid foundation for your decision, but nothing beats personalized advice. Every home has unique plumbing, venting, and power supply situations. A professional plumber can assess your specific needs, evaluate your home’s infrastructure, and recommend the perfect water heater for your budget and lifestyle. Making the correct choice ensures years of reliable hot water and energy savings.

www.poolesplumbing.com

Related Articles:

A Comprehensive Guide to Water Heater Maintenance: Winter is Coming!
Tankless water heaters, the next generation of comfort

Certified Raleigh Plumbers

Water Heater Guide for Raleigh — Tank vs. Tankless

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Choosing a new water heater is a significant decision for any homeowner. It’s an appliance you rely on daily, and the right choice can impact your comfort, energy bills, and monthly budget for years to come. For Raleigh homeowners, factors such as household size, water usage habits, and long-term cost savings play a significant role in finding the perfect fit.

Navigating the options can feel overwhelming. Should you stick with a traditional storage tank model or upgrade to a modern tankless system? This water heater guide breaks down everything you need to know about both types, helping your family make an informed decision that suits your family’s needs and budget. We will compare costs, efficiency, and performance to help you select the ideal water heater for your Raleigh home.

Water Heater Guide


Understanding Your Hot Water Needs

Before comparing models, the first step is to assess your household’s hot water consumption. Consider your “first-hour rating” (FHR) for tank models, which is the amount of hot water the heater can produce during a busy hour. For tankless models, you need to know the “flow rate” (gallons per minute, or GPM) you require.

Think about your peak usage times. Does your family often run the dishwasher, washing machine, and a shower simultaneously? A large family in Raleigh might need a system that can handle a higher demand than a couple or a single individual. Calculating your peak GPM will be crucial when looking at tankless water heaters in Raleigh.

Tank vs Tankless

Traditional Storage Tank Water Heaters

Storage tank water heaters are the most common type of water heaters found in homes across the country. They work by heating and storing a specific amount of water (typically 30-80 gallons) in an insulated tank, keeping it ready for use 24/7.

Pros of Tank Water Heaters

  • Lower Upfront Cost: The initial purchase and installation price of a traditional water heater is significantly less than a tankless unit. This makes it an attractive option for homeowners on a tighter budget.
  • Simple Technology: The design is straightforward and has been refined over the decades. Most plumbers are familiar with installing and repairing them, making service easy to find.
  • Consistent Water Pressure: Because the hot water is already stored, you can typically run multiple appliances without a noticeable drop in water pressure, provided your tank is large enough.

Cons of Tank Water Heaters

  • Higher Energy Bills: These units constantly use energy to keep the stored water hot, a process known as “standby heat loss.” This leads to higher monthly utility costs compared to on-demand systems.
  • Limited Hot Water Supply: Once the hot water in the tank runs out, you have to wait for the unit to heat another full tank. This can lead to cold showers during periods of high demand.
  • Large Physical Footprint: Storage tanks take up considerable space, which can be a problem in homes with limited utility closet or basement space.
  • Shorter Lifespan: A traditional water heater typically lasts 10-12 years before needing replacement.

Tankless Water Heaters (On-Demand)

Tankless water heaters, also known as on-demand systems, are gaining popularity with Raleigh homeowners looking for efficiency and endless hot water. Instead of storing water, they use powerful gas burners or electric elements to heat water instantly as it flows through the unit.

Pros of Tankless Water Heaters

  • Endless Hot Water: Since the water is heated on demand, you never run out. You can run the shower, dishwasher, and laundry simultaneously without worrying about a cold surprise.
  • Energy Efficiency: By eliminating the standby heat loss, tankless water heaters are much more energy-efficient. According to the Department of Energy, they can be 23%–35% more efficient than conventional storage tank water heaters, saving you money on your monthly bills.
  • Longer Lifespan: Tankless units are built to last. With proper maintenance, they can have a lifespan of 20 years or more, nearly double that of a traditional tank.
  • Space-Saving Design: These compact units are mounted on a wall, freeing up valuable floor space. This is a huge advantage for smaller homes, condos, or those looking to reclaim their utility closet.

Cons of Tankless Water Heaters

  • Higher Upfront Cost: The initial investment in a tankless water heater is substantially higher than for a tank model. Installation can also be more complex, especially if it requires retrofitting gas lines or electrical circuits.
  • Potential for Output Overload: If you purchase a unit that is too small for your household’s needs, you may experience a drop in water temperature when multiple hot water sources are running at once. Sizing is critical.
  • Slight Delay for Hot Water: There can be a brief “cold water sandwich” effect, where you get a short burst of cold water as the unit fires up to heat the incoming water.

Water Heater Guide Cost Comparison: Upfront vs. Long-Term

When choosing a water heater for your family, it’s essential to look beyond the initial price. While a traditional tank heater may apear to be less expensive to buy and install, a tankless unit often provides a better return on investment over its lifespan, saving you money everyday.

  • Upfront Cost: A standard tank water heater might cost $800 – $2,000 installed. A tankless water heater installation in Raleigh typically ranges from $2,500 – $5,000, depending on the model and retrofitting needs.
  • Operating Cost: Tankless heaters can save a family hundreds of dollars per year on energy bills. Over a 20-year lifespan, these savings can easily offset the higher initial purchase price.
  • Longevity: Since a tankless unit can last up to twice as long, you avoid the cost of replacing a traditional tank heater after 10-12 years.

For many Raleigh homeowners, the decision comes down to budget versus long-term value. If you plan to stay in your home for many years, the energy savings and longevity of a tankless system often make it the more economical choice.

Water Heater Guide Conclusion: Which Water Heater is Right for Your Raleigh Home?

The best choice depends on your specific circumstances. Here’s a quick summary to help you decide:

Choose a Traditional Tank Water Heater if:

  • You are on a strict upfront budget.
  • Your household has relatively low and predictable hot water usage.
  • You have ample space for a large tank.
  • You are not planning to stay in your home for more than 10 years.

Choose a Tankless Water Heater if:

  • You want endless hot water and are tired of running out.
  • Energy efficiency and lower monthly bills are a top priority.
  • You plan to live in your home long-term.
  • You want to save space in your utility room, garage, or basement.
  • Your family has high hot water demands.
best price water heater raleigh guarantee

Get Expert Advice and Professional Installation

Choosing and installing a new water heater is a complex job that requires professional expertise. An incorrectly installed unit can be inefficient, unsafe, and may void the manufacturer’s warranty. The licensed technicians at Poole’s Plumbing have the knowledge to help you select the perfectly sized water heater for your home and install it according to North Carolina’s strict plumbing codes.

We can provide a detailed comparison of models, explain the long-term benefits of tankless water heaters in Raleigh, and ensure your new system delivers reliable, efficient performance for years to come.

Ready to upgrade your hot water experience? Contact Poole’s Plumbing today for a consultation. Our experts will help you navigate this important decision and find the perfect water heater for your home and budget.