THE FIRST ONE DIDN'T WORK. I CALLED DR.HEATER DIRECT AND WENT TO THERE SIGHT. DR.HEATER SENT ANOTHER ONE RIGHT OUT AND A PICK-UP SLIP FOR THE OTHER ONE. WHEN ON DR. HEATER SIGHT, THE SAME HEATER WAS $30.00 CHEAPER SO I GOT SCREWED OUT OF $30.00. BUT STILL I DON'T FEEL THE HEATER IS WORTH THE $160.00 BUCKS I PAID FOR. IT DOES PRETTY GOOD.