When a water heater stops working, the first question every homeowner asks is: fix it or replace it? It is a reasonable question, and the answer is not always obvious from the symptom alone. A heater that is running cold might need a $60 thermostat. It might also need a $1,200 replacement. The difference depends on the age of the unit, what is actually wrong with it, and the specific conditions in your home.
This guide covers how to read the signs, what different problems actually cost to fix, and the decision logic a licensed plumber at Discount Plumbing TX uses when they diagnose a failing water heater in a Wichita Falls home. For immediate service, our water heater repair and installation team is available same-day.
The Age Rule: Start Here
Before anything else, find out how old your water heater is. The age is the single most important factor in the repair-versus-replace decision. You can find it on the serial number label on the side of the unit — most manufacturers encode the year in the first few characters of the serial, and the owner's manual or manufacturer website will tell you how to decode it.
The general rule plumbers use: if the heater is under 6 years old, repairs almost always make sense. If it is over 10 years old, replacement almost always makes sense. The 6–10 year window is where the specific diagnosis matters most.
The Decision Table: Symptom by Symptom
| Symptom | Repair? | Replace? |
|---|---|---|
| No hot water — pilot won't stay lit (gas) | Often repair — thermocouple replacement, $80–150 | Only if unit is 8+ years old with other problems |
| No hot water — heating element failed (electric) | Often repair — element replacement, $150–250 | Consider if unit is 9+ years old |
| Running out of hot water faster than before | Depends — could be sediment (flush first) or thermostat | If sediment flush doesn't help and unit is 7+ years old, replace |
| Popping or rumbling noise during heating | Try flush first — heavy sediment buildup | If unit is 7+ years old and noise persists after flush, replace |
| Rusty or discolored hot water | Replace — tank is corroding internally | Yes — anode rod is spent and tank steel is degrading |
| Water leaking from pressure relief valve | Depends — T&P valve may just need replacement | If valve replacement doesn't fix it, pressure issue is in the system |
| Leaking from tank body or base | Replace immediately | Yes — tank failure is irreversible. Do not repair a leaking tank. |
| No hot water — gas valve faulty | Depends on age — gas valve $200–400 | If unit is 7+ years old, replacement is better value |
| Anode rod depleted | Repair — rod replacement, $75–150 | Only if tank already shows corrosion damage |
| Unit 10+ years old, any problem | Not recommended | Replace — money spent on an old unit rarely recovers its cost |
The Leaking Tank: No Decision Needed
If water is coming from the tank body itself — not a fitting, not the T&P valve outlet, not the drain valve, but the actual steel shell of the tank — there is no repair decision. The tank has corroded through from the inside. This cannot be patched, welded, or sealed. The unit needs replacement, full stop.
The T&P (temperature and pressure relief) valve on the side of the heater is different. Water dripping from the T&P discharge pipe is not the same as a leaking tank. The T&P valve opens when pressure or temperature inside the tank exceeds safe limits. If it is discharging regularly, the valve itself may have failed and needs replacement — or there is a pressure problem in your system that needs diagnosis. Either way, call a plumber rather than ignoring it.
Why North Texas Ages Water Heaters Faster
Two local factors shorten water heater life in Wichita Falls compared to the national average:
Hard water. Wichita Falls municipal water is very hard. Dissolved calcium and magnesium settle out of the water when heated and accumulate on the tank floor as scale. The burner has to push heat through that layer, running longer and hotter. Scale also traps moisture against the tank steel, accelerating internal corrosion. The anode rod depletes faster in hard water. The result: a tank that would last 12 years in Dallas or Austin on softer water may last only 7–8 in Wichita Falls.
Temperature extremes. Hot summers mean the incoming cold water is not as cold — which means the heater cycles less in summer but is working within a higher ambient temperature in an uncooled garage. Hard winter freeze events can stress tanks in garages or utility rooms that are not truly conditioned. The thermal cycling across the year is more extreme here than in more temperate climates.
When Repair Costs More Than Replacement: The 50% Rule
A useful guideline from the home services industry: if the repair cost exceeds 50% of the cost of a replacement unit, and the unit is more than halfway through its expected service life, replacement is almost always the better financial decision.
Example: A gas water heater that is 8 years old (near the end of its expected life in Wichita Falls) and needs a gas valve replacement at $350 in parts and labor. A new unit installed by a licensed plumber might cost $900–1,100. The repair is 35–40% of replacement cost, but the heater has maybe 1–2 years of life left. You repair it, it fails 18 months later, and you spend the replacement cost anyway — plus you paid the repair bill on top of it.
The math changes for a newer unit. That same gas valve failure on a 3-year-old heater that should have 5+ years of life remaining? Repair it. The unit has paid-for life ahead of it.
Tank vs. Tankless: If You Are Already Replacing
If you have decided to replace, the secondary question is whether to stick with a tank unit or upgrade to tankless. Here is the honest comparison for Wichita Falls homes:
Tank Water Heaters
See our water heater repair and installation page for full service details and what to expect on a same-day call.
- Lower upfront cost — $800–1,400 installed for a standard gas tank unit
- Simpler technology, easier and cheaper to repair
- Work fine for most households
- Shorter lifespan in hard water — 7–9 years without softener
- Keep 40–50 gallons of hot water warm continuously, which has standby heat loss
Tankless Water Heaters
Learn more on our dedicated tankless water heater installation page, including sizing and what a Wichita Falls install typically involves.
- Higher upfront cost — $1,800–3,500 installed, depending on gas line upgrade requirements
- Endless hot water — heats on demand rather than storing
- 15–20 year lifespan when maintained (annual descaling required)
- Energy savings — no standby heat loss
- Require annual descaling in hard water areas — skip this and the heat exchanger clogs and fails
- May require gas line upgrade from ½" to ¾" — add $300–600 to installation cost if so
What to Expect on a Water Heater Service Call
When you call a licensed plumber for a water heater issue, here is what the diagnostic process should look like — and what you should expect to receive before any money changes hands:
- Age and history. The plumber should locate and read the serial number to confirm the age of the unit. This is the first filter on the decision.
- Visual inspection of the tank. Looking for rust, corrosion, scale buildup at connections, and any signs of active or past leaks.
- Checking the anode rod if the age warrants it. A depleted rod means the tank has been corroding unprotected — an important factor in the replacement decision.
- Testing the specific failed component — thermocouple, thermostat, element, gas valve — before calling it failed and pricing a replacement.
- A clear explanation of what failed, why, what options exist (repair vs. replace, tank vs. tankless), and the cost of each before anything is ordered or opened.
If a plumber walks in, looks at a heater for 90 seconds, and tells you it needs replacement without checking the anode rod or testing any component, ask them to show you what they found. A diagnosis that skips the diagnostic step is just a sales pitch.
Common Questions
My water heater is only 5 years old and already failing. Is that normal?
Not ideal, but not rare in Wichita Falls. Hard water combined with no annual maintenance (flushing, anode rod service) can accelerate failure significantly. Ask the plumber to check whether the anode rod was ever replaced — if it is fully depleted, the tank has been corroding unprotected for some time. This is repairable if the tank itself has not corroded through yet.
Can I do water heater work myself in Texas?
Texas law requires a permit for water heater replacement, and that permit requires a licensed plumber to do the work. DIY water heater replacement is technically illegal and voids the manufacturer warranty. More practically, an improperly installed water heater can develop gas leaks, carbon monoxide issues, or code violations that show up at resale. The cost of a licensed installation is worth it.
How long does a water heater replacement take?
A standard swap — same type, same location, same fuel — typically takes 2–3 hours for a licensed plumber with a stocked truck. If the gas line needs upgrade, if the location is changing, or if there is existing damage to address, plan for longer. We typically do same-day replacement if we have the right unit on the truck or can get it same day.
What size water heater do I need?
Tank size is measured in gallons. General guidance: 30–40 gallons for 1–2 people, 40–50 gallons for 3–4 people, 50–80 gallons for 5+ people or a household with high hot water demand (jetted tubs, multiple showers running simultaneously). For tankless, sizing is based on flow rate — gallons per minute needed simultaneously — and the temperature rise required from incoming cold water temperature. A plumber who works in this area will size it correctly for your household.
If you want a straight answer on whether to repair or replace your specific unit — what the plumber actually sees, what it will cost either way, and what makes sense for your situation — call Discount Plumbing TX at (940) 905-8032. We give you the diagnosis and the price before anything is ordered or started. For a plumbing emergency involving a leaking tank, our 24/7 emergency plumbing team dispatches immediately.