Job location: Heath, TX
A three-year-old Rinnai tankless water heater displaying a code 12 error was diagnosed during a return service call. The technician and Rinnai support ran diagnostics, but the issue did not occur during the visit, preventing identification of the root cause. Further troubleshooting was recommended.
Key Facts
- Service: Water Heater
- Location: Heath, TX
- Technician: Evan
- Completed: November 12, 2026
Called out for a three-year-old Rinnai tankless water heater throwing a code 12. This is a return call. We have been out here multiple times for the same issue. Upon arrival today, we talked with the customer. She told us what was occurring. We gave her pricing for diagnostics of the water heater. After approval, we ran our own diagnostics and contacted Rinnai support to run their diagnostics.
The issue did not occur while we were on site today. Our diagnostics and the Rinnai support diagnostics were unable to come up with any solutions because the issue was not occurring at this time.
Service area: Rockwall, Royse City, Rowlett, Garland, Plano, Highland Park, University Park
Hours: Available 24/7 — no overtime charges
Licensed: TX Master Plumber #41106. Fully licensed and insured.
Credentials: BBB A+ Rated · Family-Owned Since 1970
Contact: (214) 729-3586
Serving customers since 1970.