I am a skilled professional that works for a Dor-Mar Heating & Air Conditioning company. I received a call from a customer who was experiencing issues with their heating and air conditioning system. Upon arrival, I found that the control board was NLA and could not be repaired. I explained the situation to the customer and provided them with options for a replacement board. The customer decided to purchase a new board and I installed it for them. I also provided them with instructions on how to use the new board and how to maintain their system in the future.