Tankless Water Heater Repair, Installation and Service

Often a tankless unit needs more gas flow than a tank. Whether your line is enough depends on its size, its length and the other appliances sharing it. We check before quoting.

Codes point to areas such as ignition, flow, venting, overheating or sensors. Scale and venting problems are among the usual causes. We read the code, test the conditions and service the unit.

It depends on your water hardness and how much hot water you use. Harder water means shorter intervals. We set a schedule after reviewing your water.

Reducing hardness can lower scale build-up in the heat exchanger. Whether it suits your home depends on a water test and your household. Some manufacturers set water quality conditions for warranty, so check your documents.

Generally yes, within the limits of parts availability and the condition of the unit. We start with a diagnosis and tell you what we find. A diagnostic fee may apply; confirmed at booking.

Manufacturers often rate tankless units for a longer service life than tanks when they are maintained. Actual life depends on the model, water hardness, how hard the unit works and whether it is descaled on schedule. We discuss the stated ratings for the model you are considering. See water heater maintenance.

This is often called the cold water sandwich. Cold water left in the pipes reaches you between two bursts of hot water. Short draws, low flow and a sensitive flow sensor can also cause temperature swings. We check flow, the sensor and the install conditions, and a recirculation setup may help.

It depends on the unit's capacity, the temperature of the incoming water and the flow of each fixture. In an Ontario winter, colder supply water reduces how many fixtures one unit can serve. We size from your peak use, and a larger unit or low-flow fixtures may be the answer.

Not always. A recirculation setup shortens the wait for hot water at distant fixtures, but it adds equipment, power use and upkeep. Some units include a small buffer. We talk through whether the wait is a real problem in your layout before suggesting one.

Sometimes. A gas unit needs a vent route out of the building and a suitable gas supply, and building rules may limit both. Whole-home electric tankless units draw a large electrical load that many older panels cannot support. Check your declaration, then send photos and building details so we can assess.

Not usually. Gas tankless units still need electricity for controls, the fan and ignition, so hot water stops during an outage unless a backup power source is arranged. An atmospheric (natural-draft) gas tank with a standing pilot needs no electricity, so it keeps heating through an outage. Ontario storms make this worth considering before you choose.

Condensing units vent through plastic pipe to a termination point set by the manufacturer instructions and code. In winter, snow, ice and drifts can block terminations, so we check the location against clearances and snow load. Keep the termination clear after storms. See water heater installation for how the vent route is checked.

Whether the gas supply, venting and water lines can be reused, the unit's capacity, condensate drainage, electrical needs and access. Replacing a tank often needs a larger gas line and new venting. A site review lets the installer confirm what your home needs, and a quote follows it.