Bosch Boiler Troubleshooting
Common Bosch boiler problems in plain English — likely causes, the fault codes behind them, the safe checks you can make, and when to call a licensed BC gas technician.
Bosch Greenstar boilers display alphanumeric fault codes (such as EA, C7 or CE) on the digital control. Bosch builds reliable, high-efficiency units, and the code points straight to the affected system. This reference explains the common Bosch fault codes and why flame, fan, gas and venting faults must be diagnosed by a licensed BC gas technician.
Boiler repair is licensed gas work in BC. Use these guides to understand the problem and make the safe checks — but never work on the gas, combustion or safety controls yourself. If you smell gas, leave and call 911 or FortisBC at 1-800-663-9911 from outside.
Pick the problem you’re seeing
Bosch troubleshooting — FAQ
What are the most common Bosch boiler problems?
The most common Bosch boiler problems we see in Greater Vancouver are no heat, ignition and flame-loss lockouts, overheating, venting / air-pressure faults and pressure loss. Bosch boilers show a fault code when a safety circuit trips — we document 16 of them with causes and fixes.
Can I fix my Bosch boiler myself?
Only the basics — checking the thermostat, power, gas isolation valve and system pressure, and reading the fault code. In British Columbia, work on the gas, combustion or safety controls of a Bosch boiler must be done by a licensed gas fitter. Reset at most once; if a fault returns, call GasBoilers.ca at 604-359-1081.
Do you repair Bosch boilers across Greater Vancouver?
Yes. Our Red Seal–certified, TSBC gas-licensed technicians service Bosch Greenstar and Singular series across Vancouver, Burnaby, Surrey, Richmond, the Tri-Cities and the rest of Greater Vancouver, with same-day appointments often available.
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Get your Bosch boiler diagnosed by a licensed technician
Red Seal–certified gas technicians across Greater Vancouver. Upfront pricing, same-day service available.