What actually fails on a tankless in Indian Trail
Tankless units tell you what is wrong if you read them. Nearly every call starts with an error code, and the code plus the gas supply narrows it down long before anyone needs to open anything.
The local variable is the water. Yours comes from Union County Water. Where that supply is soft, scale is a slower problem here than the national troubleshooting guides assume, which means a unit throwing a temperature fault in Indian Trail is more often a flow sensor, an igniter or a gas supply problem than the limescale everyone reaches for first.
- Ignition and flame failure codes: gas supply, igniter or flame rod before anything more expensive.
- Cold water sandwich: usually a behaviour of the system rather than a fault, and worth explaining before selling you a fix.
- Flow sensor faults: common, cheap, and frequently misdiagnosed as a failing exchanger.
- Heat exchanger: the one genuinely terminal failure, and often still under a long manufacturer warranty. We check the serial before quoting.

What Indian Trail itself changes
Where the heaters sit
Almost entirely garage and utility closet installs in the production subdivisions, with attic units in the larger two-storey builds. Access is generally good and pricing is predictable.
The housing in Indian Trail
Indian Trail is one of the two strongest fits in the entire metro for water heater work right now. 59.6% of the housing stock was built between 1990 and 2009 and the median build year is 2004, which means an unusually concentrated cohort of homes reaching second-heater replacement at the same time. If your neighbours have been replacing water heaters, that is not coincidence.