make a big difference from ac to the lighting to the water heater. abc s mara schiavocampo has the details. reporter: like so many of us the merrick family is trying to beat the summer heat by cranking up their ac but their power bill is so not cool. i wish i could say that we had consistent energy saving habits in our house. reporter: the merricks say they pay a scorching $3700 a year in electric bills. enter energy expert ben bixby to find the family some hidden cash. let s go do it. first way to put money back reporter: first way to put money back in your wallet replace your old thermostat with a smart one like this nest or honeywell controlled through your phone. that s awesome. reporter: buenes s manager of emergency services says it monitors the family s heating
all all right. look at this here. an officer is behind the wheel and takes off after a driver. he saw this driver on the phone. turns out the woman behind the wheel was actually choking on something and was trying to call 911. the office gets her out, does the heimlich maneuver and saves her life. the woman faints. he lays her down on the road. calls for an ambulance. she was treated at the hospital. she s fine now. glad to know she s okay. wisconsin governor scott walker made it official. what are we up to now? 15. he s joined the already crowded reena ninan presidential field. presenting himself as a washington outsider who would cut taxes, heard that before and shrink the federal government. this sounding familiar here? and he s already spoken with us. we re up all night live with abc s david muir. reporter: wisconsin governor scott walker is now officially running for president. and he s aware how many have announced before him. you are the 15th republican