Tech performed PSA cleaning on two 5 year old split systems. 30 year old split system for the basement is not on the maintenance. Customer reports upstairs system overheated to 74 degrees when set on 68 and is now set on cooling on 67 and won't go below 70. Tech found condenser WA2F in hard lockout. Tech reset upstairs system to clear lockout and system ran correctly in the cooling mode. Switched to heat and system tripped low pressure switch immediately. Tech diagnosed failed/shut down outdoor heating mode TXV. Condenser model and serial number is correct in ServiceTitan. System is 5 years old. Quoted warranty TXV price. During maintenance, tech noticed basement thermostat calling for cooling, but older outdoor unit not running. Tech quoted $87 plus tax to diagnose older system. Customer approved diagnosing older system. Tech found system void of 6 lbs 3 oz of R22 refrigerant. Breaker that feeds outdoor unit disconnect is tripped. Tech added nitrogen but did not find any obvious l