Our home is equiped with a Nordyne E2EB-015HA furnace. I noticed and exteme amount of heat coming from th unit. when we pulled th cover off, the area behind the "blower blades" was red hot. What is the problem and how do I fix it? I shut off all breakers

Question edited for maker.

Troubleshooting blower issues.

https://www.google.com/search?q=e2eb+furnace+blower+not+working

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Between which cycles, defrost ?

Sounds like one or 2 stages of the sequencer is not kicking the other elements on. -OR- the limits ie klaxon switches in series with your elements are stuck open.

either the heat strips, fusible links on elements or sequencers.

your furnace was rated at 100% efficiency.

Hello, Namalee -

I find that the Nordyne brand is what is called a "legacy brand" owned by Nortek Global HVAC.
https://www.nortekhvac.com/

That means Nortek owns the brand name and nothing is currently manufactured with the Nordyne name.

I have looked through the Nortek Global HVAC web pages and have not found any source for a wiring diagram for your model Nordyne furnace.

I suggest you telephone the company (headquaters in O'Fallon, Missouri - Central Time zone) and ask if the company can provide you with a wiring diagram or direct you to a reliable source for it. This is the toll free phone number I found on the Nortek website:
800-422-4328

With your breaker on, the system selector switch (at your tstat HEAT/COOL/OFF) in OFF and the Fan Switch (ON/AUTO) in the AUTO position, Trace the wires from the Blower Motor to the blower relay. Try tapping gently on the relay using the plastic handle of your screwdriver/nutdriver. If the blower shuts off, the blower relay is sticking and needs replaced. Fortunately, this is a problem that will allow for the system to continue to control the temperature while you are awaiting your new part to arrive.
This is the problem for 90+% of the problem you are describing. If this does not resolve your problem, let us know and we'll look into another area.
Good Luck in your endeavor! :-)

Yes if your creful. There is a sequencer inthe unit that operates the fan in the heat mode. It sometime sticks. This is due the moisture from the ac sweating. You van pick upa sequencer at HVAC parts house. Just wire back wire to wire and you willbe ok. Kill power to furnace first. Rus

Intertherm does not offer a wiring diagram for the E1 series anymore. So I have included a link to the E2 series. They are very similar and you may find this service manual helpful for whatever problem you may be having.

http://www.nordyne.com/literature/359a.pdf

does ANYTHING come on when set to heat?