Repair-first boiler service
Combi Boiler No Hot Water
Boiler fault testing and repair
Domestic hot-water faults can involve flow sensors, diverter valves, plate heat exchangers, temperature sensors, controls, or scale.
Call 647-699-2474Boiler fault diagnosis
What this symptom can mean
Domestic hot-water faults can involve flow sensors, diverter valves, plate heat exchangers, temperature sensors, controls, or scale.
The exact cause cannot be confirmed from the symptom alone. Modern boilers may stop because a safety control detected an abnormal condition somewhere else in the system.
What we test
- Active and stored fault codes
- System pressure, temperature, and hydronic flow
- Ignition sequence and flame rectification
- Gas supply and combustion where applicable
- Venting, combustion air, fan, and condensate
- Sensors, controls, pumps, valves, and wiring
Do not keep resetting a repeated safety fault
A reset may temporarily restart the boiler without correcting the cause. Repeated lockouts, leaks, unusual odours, overheating, or venting faults should be professionally diagnosed.
Book boiler service
Send the boiler details before the visit.
Include the brand, model, visible error code, city, and a clear description. This helps us prepare for a more efficient diagnostic visit.