I HAVE A MGH-075 FURNACE IN A MOBILE HOME AND IT WORKED FINE AND THEN ONE DAY I WOKE UP TO THE HOUSE FREEZING. IT WAS BLOWING OUT COLD AIR, THE BLOWER AND THE PILOT WERE BOTH WORKING. WELL TO MAKE A LONG STORY SHORT KEPT MESSING WITH THINGS AND I AM NOT SURE IF IT WAS ME THAT SWITCHED IT TO ON INSTE...