I have a Nordyne model E!EB-015HA furance, transformer burns out after 1 minute .It was suggested by one of your good people (can't find I.D. ) to add an inline fuse to the transformer so thefuse blows and not the transformer. Where do I wire the inline fuse. On the 24 v side or the 240 side, which wire this is a Nordyne tyco transformer with BLK BLU RED on the 240 v side and BLKWHT YEL RED ON THE 24 V SIDE.. Thank you for your patience I have electrical knowledge but it is not an everyday thing .I really appreciate your help.
Retired dept of defence

Sincerely billg

It really doesn't matter, but most mfr's put it on the secondary side. A 3A blade style automotive fuse is perfect. Use about a 3 amp fuse. Comes from 40 VA/24V * (1.5 to 2).

Doesn't really matter which wire, but use the wire connected to (R) of the thermostat by convention.

You can purchase a resettable transformer for this application. But prior to turning on the power, inspect what wiring you can access for a damaged spot or short. I would next remove one of the power wires (usually Black) going to the burner motor, room air blower and A/C system if so equipped. One at a time and with power off, attach the power wires up and see which load pops the circuit breaker on the transformer.