We are in Fl. and should not have to use the furnace, but we have, temps in the 30's last night and tonight. The furnace burner keeps igniting, you can hear that loud like exploding sound several times during a cycle. I know this is not normal, I get very aggravated when I hear that sound cause while we were in Elkhart in October I had the factory look at it and they called Surburban and apparently they had a tech come out and look at it and said there is nothing wrong with the furnace. Has this happened to anybody ?? anyone know whats wrong ?? I will be calling customer service first thing in the morning, this should of been corrected while I has in Elkhart. Do it right the first time should of been the motto, I don't blame Heartland but do put the blame on the tech from Surburban or who ever they called to service it.