I have a heating furnace problem. I need a wiring diagram for the model FEHB-015HA. We had to replace the heating elements and when we tried to hook the wires back up, the white connector(full of wires) had some corriosion on some of the wires and came apart when we tried to hook it up. THankyou

You most likely have a bad fan limit / cycling switch. If you kill the power to the furnace see if you can trace the wires from the motor to where the connect to the switch. It looks like a round button with tabs sticking out of it for the wires to connect. Mark down where the wires were connected and take it to a HVAC business or furnace supply house. Be sure to have the model off the furnace with you so you can get the correct parts.

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.

If it's only a two wire system, it should be on the R/RC and W. Fan should kick on automatically.
Not too familar with that unit
A is usally for a heat pump pick-up coil or heating element
Pay attention once you've rewired the t'stat. Make sure the blower goes on automatically. The most it should take is apx five min, even if house is really cold
Also, check the heater. It may have way more options for control. You will just have to run new t'stat wire to take advantage

http://www.nordyne.com/Literature/707716c.pdf
http://www.nordyne.com/Literature/359a.pdf
The diagrams above may not be exactly what you are needing. But they will be close. Usually the diagram for the furnace is on the inside of the blower fan door. Two things come to mind. It seems like your limit switch(s) are cutting out, then in, then out, etc and may have failed totally. These are in the system to prevent the temperature in the furnace from getting too high. Why they are cutting in and out may be due to the lack of sufficient air passing through the furnace. This can be caused by, 1. the fan speed is too slow, or 2. the air filter is needing to be changed. I am not sure how proficient you are with electrical troubleshooting. I would (turn off all power to furnace) find the limit switches (usually at the top of the heating elements) and check to see (with an ohm meter) if the switches are allowing the meter's current to flow through them. Your meter should read near zero, if not, then I would replace the switch with an exact one. If you are proficient with electrical troubleshooting, I would place the furnace in the "call for heat" position, with the power on, (be careful, this stuff can hurt) and I would see if I have voltage at the heating elements, and I would check with my voltmeter across the two leads on each limit switch if there is voltage present. If there is voltage present, then the switch is probably ****.
Depending on the furnace you have, you might have a number of switches that control the heating elements, these units are usually time delay and if they fail, you should replace them with the same delay time. I hope this helps.

Check out these Installation Instructions...........wiring diagrams on the last page.

I hope you find this to be very helpful. :-)

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

why did the wiring burn?Id have the heat exchanger inspected before rewiring.better to be safe.

i need a air conditioner wiring diagram