Just wrapped up assisting a club member, who called after arriving home to find the house cold again. His heating system was displaying the same flashing 4-blink error code we addressed during our visit in November, indicating a recurring burner-related problem. After performing a full diagnostic, we determined the burner assembly was failing intermittently, so we completed a full burner replacement to restore safe ignition and consistent heat. We verified proper operation, confirmed no error codes remained, and made sure the system was running steadily for the winter season. Another Ivyland homeowner is back to reliable warmth.