Trusted Tankless Water Heater Repair Services in Southeastern Connecticut
When your tankless water heater stops working, it can disrupt your entire day – no hot showers, no clean dishes, and no peace of mind. If your tankless water heater is acting up – delivering lukewarm water, displaying error codes, or refusing to turn on at all – it’s time to call in a professional. At Moonlight Plumbing, we specialize in fast, reliable plumbing services for homes across Southeastern Connecticut and parts of Rhode Island.
Homeowners in Mystic, Old Saybrook, Groton, and beyond rely on us to diagnose and fix water heater issues quickly – restoring your comfort and your hot water with minimal disruption.

What Sets Tankless Water Heaters Apart?
Unlike traditional water heaters that store and heat water in a large tank, tankless water heaters heat water on demand. That means no waiting, less wasted energy, and more space in your utility room. But like any high-efficiency system, they require proper maintenance, and occasional repairs, to keep running smoothly.
Whether your system is gas-powered or electric, we’ve seen it all and can help with:
- Inconsistent or no hot water
- Sudden drops in water pressure
- Strange noises coming from the unit
- System error codes or indicator lights
- Ignition failure or pilot light issues
- Limescale buildup from hard water
If left unaddressed, even minor issues can lead to full system breakdowns or costly damage. That’s why prompt, professional repair is key.

Common Tankless Water Heater Issues We Repair:
- No hot water or fluctuating temperatures
- Mineral buildup or hard water damage
- Ignition or burner problems
- Error codes on the digital display
- Unusual noises or poor water pressure
Our licensed technicians are trained to service all major brands of tankless systems, and we always come prepared with the tools and parts to handle most issues on the spot.

Why Choose Moonlight Plumbing for Your Tankless Water Heater Repair?
We’re not a big-box chain—we’re your local, licensed plumbing team with deep roots in this region. Our reputation is built on honest pricing, quality workmanship, and long-term relationships with our customers.
Fast response times – We know hot water emergencies can’t wait.
Licensed & insured technicians – We get the job done safely and correctly.
Upfront pricing – No surprises, ever.
Local service – We’re based in your community and care about our neighbors.

Proudly Serving These Connecticut & Rhode Island Communities:
We’re a local team that understands the unique plumbing needs of homes in coastal New England. We proudly offer tankless water heater repair in:
- Mystic, CT
- Noank, CT
- Groton, CT
- Stonington, CT
- North Stonington, CT
- Waterford, CT
- New London, CT
- Old Lyme, CT
- Lyme, CT
- East Lyme, CT
- Niantic, CT
- Ledyard, CT
- Old Saybrook, CT
- Essex, CT
- Uncasville, CT
- Norwich, CT
- Westerly, RI
- Pawcatuck, RI
Schedule Your Tankless Water Heater Repair Today
Don’t suffer through another cold shower. Whether your unit needs a simple fix or a more advanced repair, we’re just a call away. Contact us now to schedule tankless water heater service in your area.Call Moonlight Plumbing today or book online for emergency service!