Performed a winter time tune up on the HVAC equipment. Testing system operations, component amperage’s, capacitor ratings, cleared the drain lines, replaced the air filters, tested the thermostats, dusted the return grills, and cleaned the condensers outside. Found the condenser that serves the main part of the house cutting off on low pressure. Found the expansion valve in the outdoor unit restricted. I will email an estimate to have the valve replaced. Billable