Do tankless water heaters need yearly maintenance?

Yes, tankless water heaters absolutely need yearly maintenance to prevent mineral buildup, maintain efficiency, and extend their lifespan. Without regular maintenance, you'll face reduced performance and potentially expensive repairs.

Annual descaling is the most critical maintenance task for tankless units. Ottawa's moderately hard water (around 120-180 ppm) causes calcium and lime deposits to accumulate inside the heat exchanger. This buildup reduces heating efficiency, restricts water flow, and can eventually damage internal components. Most manufacturers require annual descaling to maintain warranty coverage.

During yearly maintenance, a qualified technician will flush the system with a descaling solution, clean or replace the inlet filter, check gas connections and venting (for gas units), inspect electrical connections, and test safety systems. The process typically takes 1-2 hours and costs between $150-$250 in the Ottawa market.

Signs your tankless needs immediate attention include reduced hot water flow, fluctuating water temperatures, error codes on the display, or unusual noises during operation. In Ottawa's climate, units work harder during winter months, making spring an ideal time for annual maintenance.

Some homeowners attempt DIY descaling, but professional maintenance is recommended because technicians can spot potential issues early, properly test safety systems, and ensure warranty compliance. Gas units especially require professional attention due to combustion and venting safety concerns.

For reliable tankless water heater maintenance in Ottawa, consider scheduling annual service to keep your unit running efficiently and avoid unexpected breakdowns during cold weather when you need hot water most.