Customer stated unit would run for 4 minutes and shut off every time it ran. During evaluation found air handler and heat strips to be working properly found no issues with air handler did find the thermostat placement is right next to the attic access took a thermal picture and found that the attic door was 42° and at hinges of attic door was 38° cold attic air is reaching thermostat causing system to short cycle. Recommended attic tent to prevent cold air from hitting the thermostat customer wants to hold off for now