Springtime Air Conditioning Repair for a residential customer near Hidden Creek. Came out on service call/call back Unit coming on for one min then smart hub looses DC voltage and shuts unit off after 1 min and continues. After being on phone with Lennox tech support determined we need replace thermostat and smart hub and since was installed 4/11 and today is 5/10 no service call fee and no charge for replacing the smart hub and thermostat Came out today installed new smart hub and s30 thermostat for upstairs under warranty today's date 5/12