Kill the breaker before the cover comes off
If you open an electric tank’s cover to look, switch off its breaker first. The wires inside are live 240 volts, and the reset button only protects the tank.
Herndon, Virginia
Water heater repair in Herndon.
For water heater repair in Herndon, the plumbing visit to find what’s wrong is $49, or $250 after hours. Call SwiftPro, rated 5.0 stars across 1,130 reviews, at (703) 997-9757, 24 hours a day, 7 days a week.
SwiftPro’s plumbers in Herndon are rated 5.0 stars across 1,130 reviews and work under Virginia Class A contractor license 2705192276. Water heater repair in Herndon, where six in ten owners heat with electricity, so elements and thermostats are the repair we do most. The repair, a thermocouple, a gas valve, an element or a thermostat, is priced in writing at the tank before we start.
- The failed part named before the price
- Our own licensed plumbers
- Fired up and tested before we leave
5.0 stars across 1,130 reviews
Two of our plumbers at a gas water heater in a Northern Virginia basement.
Get your price in writing
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Licensed and insuredVirginia Class A contractor #2705192276
24/7 emergency serviceWe answer day or night, and we will tell you honestly when we can get there.
Our own plumbers, our own trucksNobody here is a subcontractor with a magnet on the door
The price is settled before the workYou see the number in writing before anything is taken apart
What it costs
What water heater repair costs in Herndon.
The visit fee is the same one on our plumbing price list. What usually fails, and when it’s the tank itself, is in our water heater repair guide.
Plumbing diagnosis visit
$49
Plumbing diagnosis visit, after hours
$250
Water heater repair (thermocouple, gas valve, element, thermostat, burner)
Priced in writing at the tank, before we start
Prices checked .
Where the repair lands depends on the part: a thermocouple or an element is a short job, a gas control valve takes longer and costs more, and either way you see the number before we start.
Water coming out of the tank body itself can’t be repaired. That’s a replacement, and the installed prices for one are on our water heaters page.
What’s different in Herndon
Herndon runs electric, so a no-hot-water call usually starts at the breaker.
Herndon is one of the few towns around here where electricity beats gas. About six in ten owners heat with it, against under four in ten on gas. The water heater follows the same pattern in a lot of houses, so the usual repair is an element, a thermostat or a reset, not a burner.
An electric tank has two elements, an upper and a lower, each with its own thermostat, all behind small metal covers. When the lower one burns out you get a little hot water and then cold. When the upper goes you get none. Either part is cheap next to a tank, and a tank that’s otherwise sound should be repaired, not replaced.
Condos and townhouses make up half the owner homes here, and the tank is often in a closet or a small room inside the unit. The breaker is in your panel, but the shutoff valve may be shared with the building. Before anyone closes a valve that feeds the next unit, call your association or building manager.
Older Herndon houses, the four in ten built before 1980, are a different story. The wiring to the tank may be undersized or the breaker mismatched, and a repair that keeps blowing a fuse is a wiring question, not a tank one. We’ll tell you which. The repair, if there is one, is priced in writing at the tank.
Neighborhood by neighborhood
What fails on water heaters across Herndon.
Census figures for the owner-occupied homes in each place, and what usually fails on the water heaters in houses like them.
| Place | Median home built | Most homes are | Heated with | What usually fails |
|---|---|---|---|---|
| Franklin Farm | 1985 | single-family houses, about 9 in 10 | electricity, about 5 in 10 | An element or a thermostat on an electric tank. |
| Herndon | 1981 | single-family houses, about 4 in 10 | electricity, about 6 in 10 | An element or a thermostat on an electric tank. |
| Dranesville | 1984 | single-family houses, nearly all | electricity, about 6 in 10 | An element or a thermostat on an electric tank. |
| McNair | 2003 | condo and apartment buildings, about 6 in 10 | gas, about 7 in 10 | The pilot, the igniter or the vent fan on a gas tank. |
| Floris | 1990 | single-family houses, about 8 in 10 | gas, about 6 in 10 | The pilot, the igniter or the vent fan on a gas tank. |
| Hutchison | 1979 | townhouses, about 5 in 10 | electricity, about 7 in 10 | An element or a thermostat on an electric tank. |
| Sully Square | 2015 | condo and apartment buildings, about 6 in 10 | gas, about 6 in 10 | The pilot, the igniter or the vent fan on a gas tank. |
By the numbers
Herndon houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
The Town of Herndon
Inside the town limits. Floris, Franklin Farm, McNair and Dranesville, on the Fairfax County side, are counted by the Census as places of their own.
- Median home built1981 Census
- Built before 1980about 4 in 10 Census
- Built since 2000about 2 in 10 Census
- Most homes aresingle-family houses, about 4 in 10 Census
- Heated withelectricity, about 6 in 10 Census
- Rentedabout 4 in 10 Census
- Many houses here heat with electricity, and an electric water heater fails differently: an element, a thermostat or a tripped reset.
- Many homes here are townhouses or condos with the tank in a closet over finished space, so a drip gets looked at quickly, before it reaches the ceiling below.
The signs
When a Herndon water heater needs a repair.
No hot water at all
On a gas tank that’s usually the pilot, the thermocouple that keeps it lit, or the gas valve. On an electric tank, it’s usually an element or the reset that tripped.
Hot water runs out fast
A shower that goes cold in five minutes often means a failed lower element on an electric tank, or a tank so full of sediment that it heats far less water.
Need water heater repair in Herndon?
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Choosing who does it
How to pick who repairs a water heater in Herndon.
Questions to ask anybody who looks at your tank, us included.
Did they test the elements with a meter?
A meter reading on each element tells you which is dead. Replacing both without testing is a guess.
Did they name the part before quoting a new tank?
A plumber who goes straight to replacement without testing the thermocouple, the valve or the elements may be selling you a tank you don’t need.
Did they check the relief valve and the venting?
A repair that leaves a stuck relief valve or a bad vent connection behind isn’t finished. Ask what else they looked at while the cover was off.
Two of our crew going over a work order before the day's calls.
From our Google reviews
What our customers say.
5.0 stars across 1,130 reviews. Read them on our reviews page.
I had a really pleasant personal experience with Swiftpro when my water heater went out. The pricing was very reasonable compared to the many other HVAC companies I sought quotes from. I highly recommend them
- 5.0stars across 1,130 reviewsHow we count them
- ABBB Accredited, A ratingCheck it on bbb.org
- 2026Voted a Nextdoor Neighborhood Faves winner two years running: 2026 in 30 Northern Virginia neighborhoods, 2025 in Emerald Chase (Herndon) and Hunters Run (Chantilly)See it on Nextdoor
- #1BusinessRate Best of 2026: the top-ranked heating contractor in Fairfax, VirginiaSee our BusinessRate score
- Class AVirginia contractor, license #2705192276Look it up with DPOR
Where we work
Water heater repair in every Northern Virginia town we serve
Next door to Herndon: Reston, Sterling, Great Falls, Oakton and Chantilly.
Fairfax County
Arlington County
Loudoun County
Prince William County
Fauquier County
Stafford County
Every town on one page
Questions
Water heater repair questions from Herndon.
Why do I get a little hot water and then none?
That’s the classic sign of a dead lower element on an electric tank, since only the top section is heating.
Can I replace an element myself?
It’s a straightforward job for someone who works with 240 volts, with the tank drained below the element. If that’s not you, a quick visit costs far less than a mistake.
How much is water heater repair in Herndon?
The visit to find what’s wrong is $49, $250 after hours. The repair is priced in writing at the tank, before we start, because a thermocouple and a gas valve are very different jobs.
Should I repair my water heater or replace it?
Repair it when the tank is sound and a part failed. When the tank itself leaks, it’s a replacement, and we’ll show you where the water is coming from before you decide.
Ready when you are
Get the hot water back on.
Call, or send the form at the top. We find what failed, show you the part, and you get the repair price in writing before we touch it.
SwiftPro Heating, Cooling & Plumbing
4230 Lafayette Center Dr N, Chantilly, VA 20151
44679 Endicott Dr, Suite 211, Ashburn, VA 20147
SwiftPro Plumber & Water Heaters
4200 Lafayette Center Dr, Suite N, Chantilly, VA 20151
Virginia Class A contractor license #2705192276
SwiftPro Heating, Cooling & Plumbing is a licensed, BBB Accredited (A rating), independently owned heating, cooling and plumbing company in Chantilly, serving Herndon and the rest of Northern Virginia. Virginia contractor license #2705192276. 5.0 stars across 1,130 reviews on Google, Angi, Yelp, the BBB and Facebook. SwiftPro maintains a dedicated HVAC team and a dedicated plumbing team.
From SwiftPro Heating, Cooling & Plumbing in Chantilly. Housing figures are the Census Bureau’s American Community Survey, 2020 to 2024, for each place named; permit, water and sewer facts link to each office’s own page and were checked in September and October 2026.