A system for providing continuous positive air pressure, CPAP, to a patient, the system comprising: a flow generator configured to generate the supply of breathable gas that is delivered to the patient via a patient interface that is configured to engage with at least one airway of the patient, wherein the breathable gas is output from the flow generator at a pressure level that is above atmospheric pressure; at least one sensor that is configured to measure a physical quantity while the breathable gas is supplied to the patient; a first wireless communication transceiver that is electronically coupled to the patient interface or the flow generator; and a computing device (104, 600) that includes at least a second wireless communications transceiver and at least one hardware processor, characterised in that the at least one hardware processor is configured to: in response to reception of user input, cause (540 - 548), via wireless communication, the flow generator to increase the supply of breathable gas from a first pressure level to a second pressure level, receive (526, 528, 530), via a wireless transmission from the first wireless communication transceiver to the second wireless communications transceiver, first sensor data that is based on measured physical quantity of the at least one sensor, determine, based on the received first sensor data, whether a leak is present, in response to determination that the leak is present based on the first sensor data during the increase of the supply of breathable gas from the first pressure level to the second pressure level, cause, via wireless communication, the flow generator to hold at a pressure level at which the leak was detected, in response to determination that there is a leak, display, to a display device that is coupled to the at least one hardware processor, a display screen (402 - 420) that includes instructions for at least a first troubleshooting option (560, 564, 566, 568, 570) to correct the determined leak, acquire (584, 586, 588) second sensor data that is based on another instance of the measured physical quantity, and determine, based on the received second sensor data, whether a leak is still present. a flow generator configured to generate the supply of breathable gas that is delivered to the patient via a patient interface that is configured to engage with at least one airway of the patient, wherein the breathable gas is output from the flow generator at a pressure level that is above atmospheric pressure; at least one sensor that is configured to measure a physical quantity while the breathable gas is supplied to the patient; a first wireless communication transceiver that is electronically coupled to the patient interface or the flow generator; and a computing device (104, 600) that includes at least a second wireless communications transceiver and at least one hardware processor, characterised in that the at least one hardware processor is configured to: in response to reception of user input, cause (540 - 548), via wireless communication, the flow generator to increase the supply of breathable gas from a first pressure level to a second pressure level, receive (526, 528, 530), via a wireless transmission from the first wireless communication transceiver to the second wireless communications transceiver, first sensor data that is based on measured physical quantity of the at least one sensor, determine, based on the received first sensor data, whether a leak is present, in response to determination that the leak is present based on the first sensor data during the increase of the supply of breathable gas from the first pressure level to the second pressure level, cause, via wireless communication, the flow generator to hold at a pressure level at which the leak was detected, in response to determination that there is a leak, display, to a display device that is coupled to the at least one hardware processor, a display screen (402 - 420) that includes instructions for at least a first troubleshooting option (560, 564, 566, 568, 570) to correct the determined leak, acquire (584, 586, 588) second sensor data that is based on another instance of the measured physical quantity, and determine, based on the received second sensor data, whether a leak is still present. in response to reception of user input, cause (540 - 548), via wireless communication, the flow generator to increase the supply of breathable gas from a first pressure level to a second pressure level, receive (526, 528, 530), via a wireless transmission from the first wireless communication transceiver to the second wireless communications transceiver, first sensor data that is based on measured physical quantity of the at least one sensor, determine, based on the received first sensor data, whether a leak is present, in response to determination that the leak is present based on the first sensor data during the increase of the supply of breathable gas from the first pressure level to the second pressure level, cause, via wireless communication, the flow generator to hold at a pressure level at which the leak was detected, in response to determination that there is a leak, display, to a display device that is coupled to the at least one hardware processor, a display screen (402 - 420) that includes instructions for at least a first troubleshooting option (560, 564, 566, 568, 570) to correct the determined leak, acquire (584, 586, 588) second sensor data that is based on another instance of the measured physical quantity, and determine, based on the received second sensor data, whether a leak is still present.