No hot water
The unit does not produce heated water when a fixture calls for it.
Tankless Water Heater Repair
Tankless unit not keeping up? Start with a focused diagnosis.
No hot water, visible error codes, inconsistent temperatures, ignition trouble, or flow-related shutdowns can all require tankless service. Duckett helps homeowners across the Upstate investigate the cause.
Do not open the unit. Note any displayed code and call Duckett.
Tankless service with the system in context.Across Upstate South Carolina
LocalFamily-owned & operated
25+Years combined experience
24/7Emergency plumbing service
ClearStraightforward pricing
★★★★★
“Will and Nate was very amazing ! They did a great job I definitely recommend them. Very good people and did a very good job.”
Lataviana OutingGoogle Reviewer · 5 months ago★★★★★
“Nate was super respectful and helpful on fixing our pressure reducing valve. Would recommend him to do future jobs.”
Karla KiddGoogle Reviewer · 5 months ago★★★★★
“Great work! 10/10 recommended. They came in, respectful, did the job in a timely manner, extremely fair priced, cleaned up the site and was out of our hair in great time. Thankful for my new well setup!”
★★★★★
“Will and Nate were.so knowledgeable and quickly assessed and diagnosed our issue with our water pressure. In addition, they provided helpful advice for troubleshooting should future issues surface. They were timely and professional and the prices were reasonable. We will call on them for future services.”
★★★★★
“These guys are awesome. I called and they were on it the next day. We had a water line installed from home down to dock, had a sewer leak, a toilet running, a hot water heater installed and low water pressure. They repaired everything. All the employees were so kind and done more that what they were supposed to do. I highly recommend this company to do a great job.”
★★★★★
“Nate an Kevin came out last month and did an amazing job replacing my well setup. They was here fairly quick and got the job done same day. Definitely recommend them for any an all plumbing aspects.”
★★★★★
“Called for someone to come out to take a look at leak under my sidewalk next to my house/front door. Two gentleman came out on time, quickly diagnosed the problem, and gave me information about the fix.”
★★★★★
“Service was great! The plumber was extremely helpful and courteous. He fixed my issue quickly and was very respectful of my time constraints with another appointment. I appreciate the help!”
Review 1 of 8: Lataviana Outing
Recognize the change
Signs a tankless unit needs service.
Note what happens at the fixtures and anything shown on the unit display. Avoid opening or resetting equipment repeatedly.
Error code appears
The display reports a fault or repeatedly returns to the same code.
Temperature changes
Water becomes unexpectedly hot, cool, or inconsistent during use.
Ignition or flow trouble
The unit tries to start, shuts down, or responds only at certain flow rates.
No hot water or an active leak? Call Duckett.
(864) 209-9360Share the displayed code and keep the unit closed for diagnosis.
What we can help with
Read the fault.
Check the conditions behind it.
A displayed code is useful, but flow, fuel or power, venting, water conditions, controls, and internal components may all influence the result.
Tankless diagnostics
Review symptoms, displayed information, and operating conditions.
Temperature problems
Investigate inconsistent heating or unexpected changes during use.
Ignition concerns
Assess relevant fuel, ignition, and combustion conditions safely.
Flow-related issues
Check whether water flow and demand are affecting unit operation.
Serviceable components
Explain the component or maintenance work supported by the findings.
Codes are clues
Tankless faults connect
to operating conditions.
Water flow, fuel or power, venting, controls, and maintenance condition can all affect how the unit responds.
The complete unit
Diagnosis considers the heater and its visible utility and water connections.
The supporting installation
Flow, venting, and connection conditions may contribute to recurring faults.
What to expect
A fault code is the start, not the conclusion.
Describe the hot-water problem
Tell us what the system is doing, when it started, and whether you have seen water around the unit.
Assess the system
A technician reviews the code, operating symptoms, and connected installation before explaining service options.
Review the next step
Understand the proposed work and pricing before deciding how to move forward.
Common related problems
Tankless symptoms
often overlap.
Share the exact code if visible and describe when the problem occurs.
Talk to Duckett
No hot water
Ignition, energy supply, flow sensing, controls, or another fault may prevent heating.
Error codes
Codes guide diagnosis but should be interpreted with the unit and installation conditions.
Inconsistent temperature
Demand, flow, scale, controls, or component performance can affect output.
Ignition failure
Fuel, venting, ignition, and safety controls require careful assessment.
Low-flow shutdown
Some symptoms appear only when fixture flow falls below what the system recognizes.
Maintenance-related performance
Water conditions and service history may contribute to reduced heat transfer or faults.
Why Duckett
Local people.
Straightforward help.
Duckett brings more than 25 years of combined plumbing experience to residential hot-water service. The team uses the visible symptoms and system conditions to explain repair options clearly.
Family-owned & operatedStraightforward pricing24/7 emergency plumbing
Request Service Google Reviews
Customer reviews
What customers remember.
Verified customer feedback from Duckett Plumbing’s published website and supplied Google Business Profile material.
★★★★★
“Will and Nate was very amazing ! They did a great job I definitely recommend them. Very good people and did a very good job.”
Lataviana OutingGoogle Reviewer · 5 months ago★★★★★
“Nate was super respectful and helpful on fixing our pressure reducing valve. Would recommend him to do future jobs.”
Karla KiddGoogle Reviewer · 5 months ago★★★★★
“Great work! 10/10 recommended. They came in, respectful, did the job in a timely manner, extremely fair priced, cleaned up the site and was out of our hair in great time. Thankful for my new well setup!”
★★★★★
“Will and Nate were.so knowledgeable and quickly assessed and diagnosed our issue with our water pressure. In addition, they provided helpful advice for troubleshooting should future issues surface. They were timely and professional and the prices were reasonable. We will call on them for future services.”
★★★★★
“These guys are awesome. I called and they were on it the next day. We had a water line installed from home down to dock, had a sewer leak, a toilet running, a hot water heater installed and low water pressure. They repaired everything. All the employees were so kind and done more that what they were supposed to do. I highly recommend this company to do a great job.”
★★★★★
“Nate an Kevin came out last month and did an amazing job replacing my well setup. They was here fairly quick and got the job done same day. Definitely recommend them for any an all plumbing aspects.”
★★★★★
“Called for someone to come out to take a look at leak under my sidewalk next to my house/front door. Two gentleman came out on time, quickly diagnosed the problem, and gave me information about the fix.”
★★★★★
“Service was great! The plumber was extremely helpful and courteous. He fixed my issue quickly and was very respectful of my time constraints with another appointment. I appreciate the help!”
Review 1 of 8: Lataviana Outing
Areas we cover
Based in Greenville. Working across the Upstate.
Based in Greenville, Duckett serves homeowners across a wide network of Upstate South Carolina communities.
Check availability by phoneGreenville
Anderson
Easley
Greer
Mauldin
Seneca
Taylors
Simpsonville
Spartanburg
Laurens
Greenwood
Clemson
Tankless Water Heater Repair
Share the symptom or displayed code.
Tell us whether there is no hot water, changing temperature, ignition trouble, or a code on the display. Keep the unit closed.
Call Duckett(864) 209-9360