Tankless water heater repair in Aurora, CO

Every manufacturer uses its own code list, but most fall into a few groups: ignition and flame, gas supply, venting and airflow, overheating, and water flow. A code is a starting point, not a diagnosis. An ignition code can mean a bad igniter, a dirty flame rod, low gas pressure or a blocked air intake, and the right fix depends on which one it is.

We check the fault history stored in the unit, not just the current error. A heater that has logged dozens of flame losses over the winter tells a different story than one that threw a single code last night. That history helps us find the root cause rather than clearing the screen and leaving you to see the same code next week.

As water heats, minerals drop out and stick to the inside of the heat exchanger. The coating acts like insulation, so the unit runs hotter to reach its set temperature. Eventually it trips the overheat limit, restricts flow or starts making noise. Flushing with a descaling solution through the isolation valves dissolves that buildup and restores normal operation.

We circulate the solution for the time the manufacturer recommends, then flush with clean water, clean the inlet filter and check the flow sensor. If your unit was installed without isolation valves, we add them during the visit, so future flushes take less time and never require cutting into the pipes again.

Most tankless parts are replaceable: igniters, flame rods, flow sensors, fans, gas valves and control boards. The expensive one is the heat exchanger. A cracked or badly corroded exchanger on an older unit can cost a large share of a new heater, and that is when we put both numbers in front of you side by side.

Age matters too. A unit approaching twenty years old with a failed exchanger is usually worth replacing. A five year old heater with the same failure may still be covered by its manufacturer, so it is worth finding the paperwork before paying for the part yourself. We help you check the details on the unit's label.