Today I arrived on site to address a thermostat issue affecting the heating and AC system. Thermostat Assessment:Identified the thermostat's batteries were not working. Noticed the thermostat was out of place. Corrective Actions:Replaced the thermostat batteries. Secured the thermostat in its proper position. Upon arrival at the property. The client explained to me that around 11am the Heat stopped working. The client directed me to where the furnace unit is. I proceeded to verify the system. Aisle the tstat of the united. I tore the system from the control board. The furnace began to operate normally. I proceeded to verify the tstat. I found that the tstat was out of place. I fixed and pressed the tstat on the wall. Replace the tstat batteries. The client provided the batteries. I concluded with the repair. I torn the system from the tstat. The system began to work normally. I monitor the system for a few minutes. There were no failures or malfunctions in the system