Completed maintenance on one peerless hot water boiler removed and cleaned the burners and electronic spark igniter and checked automatic water feeder and low water cutoff turned system on and checked operations left working also performed maintenance on two unico hydro air handlers checked electrical and mechanical components and electrical connections and blower wheels tested system operations and left working homeowner was not there at the time of completion of the maintenance left all systems working thermostats set at 67 degrees as found them set at