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Clean burner pot and burner ring at least once a week. 4 Poor connection between sliding panel with bottom and burner pot. Check packing and slide construction. Replace packing if necessary. Adjust set screw for spring pressure. 22 Flame control thermostat is defective. Connect the two wires to the thermostat (attention, 220V) on nr. 5 and 12 If main blower starts to rotate, this indicates a defective thermostat. 2 3 3 2 2 Insufficient chimney draught. Min. draught = 2 mmwk Chec