Most Louisville water heaters that stop heating or start leaking have one worn part, such as an element, thermostat, igniter, thermocouple or valve, and a plumber can usually replace it on one visit. A tank that leaks through its wall needs to be replaced. Call the number on this page to be connected with a local plumber in Louisville.
What happens when you call
Your call is connected to an independent plumber who works in Louisville. Expect questions about the fuel type, how old the heater is, and what you have noticed. On site, the plumber checks power or gas, tests elements and thermostats or the burner and ignition, inspects the relief and drain valves, and looks at the fittings and venting. You get a plain explanation of the problem and whether it is worth repairing before any work starts.
Cost factors
- The component. Elements and thermostats cost less than gas valves, igniter assemblies or power-vent blowers.
- Heater type. Newer high-efficiency and tankless units in rebuilt homes use different parts than older tanks.
- Location. Older basements around downtown can be tighter to work in than newer mechanical rooms.
- Replacement. If the tank has failed, the job becomes a replacement with plumbing inspection by the city.
Local conditions in Louisville
Louisville is a former coal-mining town turned suburban community in southeastern Boulder County, with a historic downtown and miles of trails. Hundreds of homes were rebuilt after the December 2021 Marshall Fire, so the city has an unusual mix: older houses near Main Street with long-serving heaters, and rebuilt homes with much newer equipment, sometimes tankless or high-efficiency units. Newer equipment fails differently than an old tank, often with an error code or an electronic ignition fault rather than a leak.
The City of Louisville runs its own water utility with two treatment plants, drawing surface water from South Boulder Creek, stored in Marshall Lake, Harper Lake or Louisville Reservoir, plus Colorado River basin water. It disinfects with chlorine rather than chloramine. The report does not state hardness, so how much sediment a tank holds is something a plumber checks by draining it.
The city's Building Safety Division reviews and issues building permits and performs plumbing inspections, with an online portal for applications. For a water heater replacement, the plumber can handle the permit. Natural gas comes from Xcel Energy; if you smell gas, leave the house first, then call 911 and Xcel at 1-800-895-2999 from outside.
Before the plumber arrives
- Turn off the heater and its cold supply if it is leaking
- Note any error code on a tankless or electronic unit
- Find the label with the model and date
- Clear space around the heater
Water Heater Repair questions in Louisville
Can a plumber repair a tankless water heater that stopped working?
Water is dripping from the relief valve pipe. What does that mean?
Is a water heater over 10 years old worth repairing?
What should I do if I smell gas near the water heater?
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