Error codes
Codes help narrow the problem but still need on-site confirmation.
Expert tankless water heater diagnostics and repair. We fix error codes, descale units, replace parts, and restore your endless hot water.
Full diagnostic of error codes to identify the exact issue with your tankless unit.
Thorough descaling to remove mineral buildup and restore optimal heat transfer efficiency.
Inspection and replacement of igniter and flame sensor components for reliable ignition.
Flow sensor testing and calibration to ensure proper water detection and activation.
Mississauga homeowners trust us for thorough, honest tankless water heater repair that restores reliable hot water on demand.
Olu HVAC Mississauga is based at 7433 Sigsbee Dr in Mississauga and works across the GTA.
Call (437) 999-4242 any time. We answer outside business hours.
No surprises or hidden fees. We quote a flat rate before starting any work so you always know the cost.
Call us today for expert tankless water heater repair in Mississauga.
Call (437) 999-4242Service Details
Tankless repair depends on the error code, water flow, ignition, venting, maintenance history, and water quality. A service visit should separate a simple maintenance issue from a failed component.
Codes help narrow the problem but still need on-site confirmation.
Flow sensor, ignition, gas, venting, or control issues can stop operation.
Scaling, flow rate, mixing valves, or demand changes can affect outlet temperature.
Units that have not been flushed may need descaling before parts are replaced.
Inspection Focus
Process
We start with the symptoms, equipment type, location, access notes, and how urgent the issue is.
The technician checks the parts of the system that can actually cause the problem before quoting work.
You get a practical repair, maintenance, or replacement recommendation before approved work begins.
Real answers to questions Mississauga and GTA customers ask us most.
Error codes vary by brand. Common causes are scaling, ignition issues, low gas pressure, or venting blockages. We diagnose the actual cause and fix it.
Once a year in Mississauga's typical water hardness, more often if you have very hard water. Annual flushing prevents scale build-up that causes errors and shortens life.
Often caused by a scaling-induced ignition delay, a flow-rate issue, or sensor problems. We diagnose the actual cause.
Yes. Call (437) 999-4242 for 24-hour service.
Olu HVAC Mississauga is open 24 hours. Call us, email us, or send a message.