Defrost mode not disengaging. diy-18-hp-c-230ae Arrived for previous customer not heating well. Spoke with homeowner about the systems performance. It’s going into defrost mode and won’t come out of it. Inspected equipment took temp readings and ran system for 30 minutes. 100 degree out put. 28 degrees coming off outdoor coils. System never went into defrost. Spoke with homeowner about options, another tech was out and talked to him about replacing the defrost board. I will call homeowner tomorrow about parts availability and he will contact Lowe’s about warranties. System is running properly at this time. 14JAN2023 Jason B Spoke with Ron on the phone today, mr cool defrost board has been out of stock and will be unavailable until March 2023. He will call if it stops working otherwise contact him when the part is available with a price. Confirmed system was working over phone.