Customer called in with a no heat call. I arrived at the home, the air handler unit was operating but the condenser unit was in lock out mode. I reset the system and it began operating properly. After letting the system run, I found that the fan was not engaging when going into defrost mode. I inspected the defrost board and found that it had some burnt spots on it by the resistors. I ordered the defrost board it was in stock and is going to be delivered to the shop. I told Mr. Sprinkles we would be back out in a couple of days. Thank you for your business today. Havana, Florida.