Dispatched for no heat on main floor system. System had code for lockout due to 3 * attempt and no flame detected. After multiple test on the gas valve and other components. It was determined to have a faulty two stage gas valve. Thank you for allowing us in your house to provide the perfect home service and for being a member of the perfect family service club from your LBA Lead Service tech Calvin. If I provided a positive or five star experience. I’d appreciate you sharing your thoughts in a review.