1 Prepare for safe work
Turn off the system at the control unit, wait for water and metal parts to cool, and read the instructions for your specific model. In case of gas, smoke, or electrical failure, stop immediately and call an authorized service.
⚠ Warning: Soot buildup can cause chimney fires. Crackling, roaring, and sparks from the chimney require immediate call to the fire department.
2 Recognize when draft is weak
Note whether the problem occurs only at startup, in warm weather, when windy, or when the kitchen hood and ventilation are running.
3 Check accessible openings on the cold system
Clean the ash tray and smoke ducts on the appliance according to the instructions. Do not climb on the roof or push makeshift objects into the chimney.
4 Schedule chimney inspection and cleaning
A chimney professional should check for soot, nests, condensation, cross-section, height, and end cap, and issue a recommendation for safe operation.
? Tip: Take a photo of the initial state and change only one thing at a time. That way you’ll know which check actually affected the problem.
5 Reassemble, test, and set limits
Return settings one by one and monitor temperature, pressure, sound, and any possible leaks. If values don’t stabilize or the alarm repeats, leave the system off and request professional diagnostics.