Performed routine maintenance per energy savings agreement. Technician did not find any challenges at todays visit. The system is heating properly and holding a delta t of 20+ degrees. One recommendation the tech had is to replace the contactor in the system. The one currently in the system is showing signs of pitting. This is a sign of potential future failure. Tech recommends replacing to avoid system downtime and a future service call. Estimate built and added to system for customer review