Cold upstairs, hot downstairs
If one floor has hot water and another doesn’t, the cause is often a second tank or a recirculation pump, not the main heater. Tell us which taps work.
Great Falls, Virginia
Water heater repair in Great Falls.
For water heater repair in Great Falls, 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 Great Falls are rated 5.0 stars across 1,130 reviews and work under Virginia Class A contractor license 2705192276. Water heater repair in Great Falls: five-bedroom houses with two tanks, long pipe runs and some propane, where half the house can go cold. 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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Rather talk now? (703) 997-9757
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 Great Falls.
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 Great Falls
Great Falls houses often have two water heaters, and one can quit alone.
Almost half the homes in Great Falls have five bedrooms or more, and nearly all are detached. A house that size often has more than one water heater, or one big tank plus a second for a far wing or a basement suite. When one fails, the other keeps going, so the call is not no hot water but the upstairs shower is cold.
That’s a diagnosis job. We find which tank feeds which fixtures, because the labels on the pipes are rarely right after a renovation. Then we test that tank. Two tanks also tend to age together. If one needs a repair and its twin is the same age, we’ll say so, and you decide if you want both looked at while we’re there.
Fuel varies here more than in most towns. Under half of owners use utility gas, about four in ten use electricity, and roughly one in twelve is on propane. A propane tank works like a gas one, so the repairs are the same family of parts. If the propane tank outside has run low, an empty gauge looks like a dead heater.
Big houses on big lots also have long pipe runs, and many have a recirculation pump to bring hot water to the far bathrooms faster. If that pump or its check valve fails, you get cold water at the tap even when the tank is hot. We test the pump too, so you don’t pay for a tank repair that wasn’t the problem. Repairs are priced in writing at the tank.
By the numbers
Great Falls houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Great Falls
- Median home built1986 Census
- Built before 1980about 4 in 10 Census
- Built since 2000about 2 in 10 Census
- Most homes aresingle-family houses, nearly all Census
- Heated withgas, about 5 in 10 Census
- Rentedhardly any Census
- Most homes here are detached houses with the tank in a basement or garage, where there’s room to work and a floor drain nearby.
The signs
When a Great Falls 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 Great Falls?
A person answers day and night. See this month’s deals before you call.
Choosing who does it
How to pick who repairs a water heater in Great Falls.
Questions to ask anybody who looks at your tank, us included.
Did they trace which tank feeds which taps?
In a house with two heaters, the right repair depends on the right tank. Tracing the lines first avoids paying for the wrong fix.
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.
Jim was very professional, knowledgeable and polite plumber. He installed a water heater for us. After the installation he educated us on the maintenance and the new set up. I strongly recommend Jim/SwiftPro. Plus SwiftPro price was very reasonable/20% below other estimates.
- 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
Questions
Water heater repair questions from Great Falls.
Why is the hot water slow to reach our far bathroom?
A long pipe run is the usual cause. If you have a recirculation pump, a weak pump or a stuck check valve is the next suspect.
Should I repair both water heaters if they’re the same age?
Not always, but it’s worth a look at the second one while we’re there, so a second failure doesn’t catch you next month.
How much is water heater repair in Great Falls?
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 Great Falls 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.