I performed a diagnostic on a Carrier electric furnace due to having no heat. Upon arrival customer stated the heat pump is running and shutting off rapidly about every 5 seconds. I checked the heat pump, found system off on low pressure. Weighed in 5 lbs 10 oz of r410a to get the system Running. Suction pressure at 102 which is correct with the current ODAT. Discharge line is 132. Let customer know we will come back and preform a leak search, find the leak and repair it. No cost for repair, system was installed 2 years ago