HVAC technician, heating and cooling, thermostat installation, thermostat replacement. pro 1, 1 Non-programmable, 1 Ht/1cl, 1 Stage, 4" Display Battery Or Wired. Upon arrival customer stated that their cooling side of the HVAC system wasn’t working. Upon inspection I found that the thermostat was bad. Replaced the thermostat, checked for proper operation. OK House temperature is 88 degrees and supply vent temperature is 72 degrees. Pressures are now 155-320psi. System is working properly.