Springtime Thermostat Repair for a residential homeowner near Windsor Park. Upon arrival homeowner stated that the upstairs thermostat went blank and wouldn’t come on. Found thermostat on and working. Checked upstairs furnaces wire connections, checked drain lines and checked connections at the thermostat. Found no water in emergency pan or in secondary reservoir that would cause the float switch to activate. I did find the main drain line for unit was falling backwards causing system to not drain properly. Fixed fall of main drain line. Explained to homeowner that if thermostat cuts out again take a video of it and let us know, thermostat could have underlying issues. System is operating properly at this time.