3400Heat4 20KW This kit contains four 7/16" 5KW coils with bolt ends and four 3400-3151 limit switches and bolt to spade connectors. Heating element restring kit for 18.5 - 20.8KW Coleman electric furnaces. Since heating elements are no longer available for the Coleman 3400 & 3400A series electric furnaces, our repair kits will put your element back in working order. Use this kit on the following heating elements: 3400-337 & 3400-3371 found on the 3400-720 and 3400-820 furnace. 3400-338 & 3400-3381 found on the 3400-823 furnace. 3300-420, 3300-4201 & 3300A4201 found on the 3400A820 furnace. 3300-423, 3300-4231 & 3300A4231 found on the 3400A823 furnace.