Talked to Margaret regarding ongoing issues with system. She said she would have to reset the power to the furnace a few times a week as it would stop cooling and get to 80 degf in the home. She said the indoor fan would run but she does not think the outdoor unit was on. Turned on system and observed operation. Checked over all wiring on the system. The outdoor unit does have a Copeland Coresense on it to protect the compressor. There were no alerts at this time. Checked system charge and cycled unit several times. Inspected air filter. All is working at the time of service. Measured capacitor and inspected contactor. Capacitor is new and contactor shows signs of wear. Ordered new Coresense and contactor to have on site. It is recommended that when problem occurs again, the customer will remove cover to obtain the LED code from the outdoor unit so we can further understand the problem.