Water Heater Repair in Overland Park, KS
A water heater usually gives a little warning before it quits: water that runs lukewarm sooner than it used to, a popping or rumbling tank, a damp spot on the floor, or a relief valve that drips. We diagnose the actual cause before recommending anything, so you know whether you need a part or a new heater.
We work on tank-style gas and electric heaters in Overland Park homes and across south Johnson County. If a repair isn’t worth it, we’ll say so and explain why.
Local Overland Park plumber · Open 7 days, 7 AM–8 PM
Signs your water heater needs attention
- No hot water at all, or hot water that runs out much faster than before
- Popping, crackling or rumbling while the burner or elements run (often sediment)
- Water pooling around the base, or rust-colored water from the hot side only
- The temperature-and-pressure (T&P) relief valve dripping or discharging
- A gas heater whose pilot won’t stay lit, or a burner that lights and shuts off
- Hot water that smells like sulfur or rotten eggs
Symptom by symptom: the usual causes
| What you notice | Common causes on a gas heater | Common causes on an electric heater |
|---|---|---|
| No hot water | Pilot out, failed thermocouple or flame sensor, gas valve, closed gas supply | Tripped breaker, tripped high-limit reset, failed upper element or thermostat |
| Hot water runs out fast | Heavy sediment, broken dip tube, thermostat set low | Failed lower element, sediment burying the lower element, broken dip tube |
| Rumbling or popping | Sediment on the tank bottom boiling under the burner | Scale on elements (often a hiss or sizzle) |
| Relief valve dripping | High pressure from thermal expansion (no working expansion tank in a closed system), thermostat set too high, or a worn valve | |
| Water at the base | Drain valve, relief-valve discharge, condensation, or a leaking tank (replacement) | |
| Rotten-egg smell on the hot side | Reaction between the anode rod and water; an anode change or flush often helps. If you smell gas instead, leave the house and call your gas utility. | |
What we check
On gas heaters we look at the pilot assembly, thermocouple or flame sensor, gas valve, burner and venting. On electric heaters we test the heating elements, thermostats and wiring. On both we check the anode rod, the T&P valve and its discharge line, the dip tube, the supply connections and the tank itself.
A dripping relief valve is often a pressure problem, not a bad valve. In homes with a pressure-reducing valve or a check valve on the main, water has nowhere to go when it heats and expands. A missing or failed expansion tank is a common cause, and replacing the relief valve alone won’t fix it.
Talk to a plumber about water heater repair
Call (913) 379-3324 or book online. Open 7 days, 7 AM–8 PM.
Safety checks that matter
- Never cap or plug a relief valve. It is the last line of defense against a tank over-pressurizing.
- Venting: a gas heater that back-drafts can spill combustion gases into the house. A working carbon monoxide alarm near fuel-burning appliances is cheap protection.
- Temperature: very hot settings scald. Many households set the thermostat around 120°F; if anyone in the home needs a different setting, ask us about mixing valves.
- Gas smell: don’t troubleshoot. Leave, then call your gas utility from outside.
Repair or replace?
Thermocouples, igniters, elements, thermostats and relief valves are normal repairs. A leak from the tank body is not repairable: once the steel tank is weeping, replacement is the only fix. Age matters too. Most tank heaters have a design life of roughly 8 to 12 years, so a major repair on a heater near the end of that range is often money better spent on a new unit.
A quick way to find the age: the serial number on the rating label usually encodes the month and year of manufacture. Manufacturers use different formats, so we’ll read it for you if it isn’t obvious.
If replacement makes more sense, see water heater replacement and installation or, if you’re weighing a switch, tankless water heaters.
Hard water and your heater
WaterOne’s 2026 Water Quality Report lists average total hardness of 135 ppm (range 110–157), about 7.9 grains per gallon. The City of Olathe’s 2025 report lists 150 mg/L, about 8.8 grains per gallon. Both fall in the U.S. Geological Survey’s “hard” range of 121–180 mg/L: enough to build scale in tanks, tankless heat exchangers, valves and aerators over a few years.
In a tank heater, those minerals settle as sediment on the bottom. On a gas heater that means rumbling and wasted heat; on an electric heater the lower element can end up buried. Regular flushing and an anode check slow it down. See water heater maintenance for what a flush involves.
Sources: WaterOne 2026 Water Quality Report (2025 data); City of Olathe 2025 Water Quality Report; U.S. Geological Survey: Hardness of Water. Checked October 2026.
What affects the cost
- Gas vs electric, and which part has failed
- Access (attic, closet or finished-basement installs take longer than an open utility room)
- Whether code-required items are missing, such as an expansion tank, drain pan or discharge line
Permits for water heater work in Overland Park
Repairs that only replace parts on the heater generally don’t need a permit. Overland Park adopted the 2024 International Plumbing Code with local amendments, effective July 1, 2026 (Ordinance BC-3499). The plumbing work that doesn’t need a permit is narrow: stopping leaks, clearing stoppages, and repairs that don’t replace or rearrange valves, pipes or fixtures. Once defective concealed pipe has to be removed and replaced, the code treats it as new work that needs a permit and inspection. Replacing the heater itself is new work and needs one; see our guide to water heater permits in Overland Park.
Source: Overland Park Ordinance BC-3499 (2024 International Codes, effective July 1, 2026). Checked October 2026.
How it works
- Call or book. We help you stop the water first if needed, then give you an arrival window.
- Diagnose. We find the actual cause and show you what we found.
- Options before work. Repair vs replace, explained plainly. Nothing starts until you say go.
- Fixed to code. Permit and inspection handled where required, and the work area left clean.
Water Heater Repair: common questions
Why is my water heater’s relief valve dripping?
Common causes are excessive pressure from thermal expansion (often a missing or failed expansion tank in a home with a pressure-reducing valve), a thermostat set too high, or a worn valve. Replacing the valve without checking pressure often just moves the problem.
Can a leaking water heater tank be repaired?
Leaks from fittings, the drain valve or the relief valve can usually be repaired. A leak from the tank body itself cannot; the heater needs to be replaced.
How long do tank water heaters last?
Many tank heaters last roughly 8 to 12 years. Water hardness, maintenance and installation quality all move that number. The serial number on the label usually encodes the manufacture date.
Why does my hot water smell like rotten eggs?
Usually a reaction between the anode rod and minerals or bacteria in the water inside the tank. Flushing the tank and changing the anode type often fixes it. If the smell is gas, not water, leave the house and call your gas utility.
My electric water heater has no hot water. What can I check?
Check the breaker first. Many electric heaters also have a high-limit reset button behind the upper access panel; if it has tripped, something caused it, so a repeat trip means a thermostat or element needs attention. Turn the power off before opening any panel.
Is the water in my area hard?
Yes. WaterOne’s 2026 report lists about 135 ppm (7.9 grains per gallon) and the City of Olathe’s 2025 report lists 150 mg/L (8.8 grains per gallon). Both fall in the USGS “hard” range.
Do you repair tankless water heaters too?
Yes. See our tankless water heater page for descaling, error codes and repairs.
Available in
- Overland Park: our home base in south OP.
- Olathe: Whether you’re on City of Olathe water or WaterOne affects scale and sediment in your tank.
- Lenexa: Sediment, relief-valve and pilot problems on WaterOne-served homes.
- Stilwell: Including homes on private wells, where water quality can be very different.
Guides for homeowners
- Do You Need a Permit to Replace a Water Heater in Overland Park?: Permits, licensing and inspections for water heater replacement in Overland Park, with the code sections behind them.
- Olathe Water vs WaterOne: Which Do You Have and Why It Matters: Olathe’s two water systems (and two sewer systems), their hardness numbers, and why your plumber cares.
- Why Your Water Heater Relief Valve Drips: PRVs and Expansion Tanks: Why newer homes with pressure-reducing valves need working expansion tanks, and what a dripping relief valve is telling you.
Related services
- Water Heater Replacement & Installation: Gas and electric tank heaters sized to your home and installed to current code.
- Water Heater Flush & Maintenance: Sediment flushes, anode checks and relief-valve tests to stretch your heater’s life.
- Tankless Water Heaters: Installs, descaling and error-code repairs, plus honest advice on tank vs tankless.
- Leak Detection & Repair: Find hidden supply and drain leaks before they become ceiling, floor or slab damage.
- Emergency & Same-Day Plumbing: Burst pipes, backups and no-water calls, answered 7 days a week, 7 AM–8 PM.
Get help with water heater repair
Call (913) 379-3324 or book online. Open 7 days, 7 AM–8 PM.