Tankless water heaters don't burst like tanks — they weep, drip, and seep. The usual suspects are water connections that have worked loose, a cracked condensate drain, a failing pressure relief valve, or, in hard-water country like ours, scale buildup stressing internal seals. We service all major tankless brands and stock the fittings and service valves these units need.
DeSoto's mineral-heavy water is the number-one enemy of tankless longevity. Without regular descaling, scale insulates the heat exchanger, drives up operating temperatures, and shortens seal life. Every tankless leak visit includes a scale assessment so we fix the leak and the conditions that caused it.
Active leak, no hot water, or gas smell — don't wait. Call Emergency Line
Inspect: connections, condensate routing, relief valve, and heat exchanger are checked under pressure.
Repair: fittings resealed or replaced, condensate lines cleared and re-routed, faulty valves swapped.
Descale: we recommend a flush to protect the repair — most DeSoto units are overdue.
Storm-season note: outdoor-mounted tankless units take the brunt of wind-driven rain and hail. After any severe storm, check the vent termination and cabinet for impact damage — a cracked cover lets water straight onto the electronics.
| Service | Typical Range |
|---|---|
| Tankless leak diagnosis / service call | $89–$149 |
| Minor tankless leak repair | $150–$400 |
| Full tankless unit replacement | $1,200–$3,500 |
Ranges are representative market estimates for the DeSoto area and can vary by unit size, access, and parts. Final pricing is confirmed on-site before any work begins. Owner to verify.
They can't suffer a catastrophic tank rupture since there's no stored water — but they still leak at connections, valves, and condensate drains. The leaks are smaller but can run unnoticed longer.
Power surges can damage control boards and freeze-protection circuits; pressure spikes from municipal line work after storms stress inlet fittings. Both are common post-storm findings.
With our hard water, once a year is the safe interval. Skipping flushes is the fastest route to a leaking heat exchanger.
Conversion is a bigger project — gas line sizing, venting, and condensate routing all change. We can quote it on the spot and schedule the installation.
We also serve Cedar Hill, TX, Duncanville, TX, Lancaster, TX, Glenn Heights, TX, Red Oak, TX, Ovilla, TX and all surrounding areas. Back to the DeSoto water heater leak repair homepage.
Tankless water heater leaking at fittings or condensate lines in DeSoto, TX? We service all major tankless brands. One call gets you a real dispatcher and upfront pricing.
Call (833) 713-2101