Are the elements ohm open which would they would have to be replaced and you find them here
http://www.americanhvacparts.com/?OVRAW=heating%20parts%20Furnace&OVKEY=part%20furnace&OVMTC=advanced&OVADID=3447174012&OVKWID=38207624012
HVAC Technician
35 years experience, HVAC