You said you "changed the element", soooo , WHY do you need a "part #" ????
Make sure unit is unplugged, and pull leads off of element.
Clean the element contacts w steel wool,Scothbrite pad, fine sandpaper,or similar.
Check the element w a VOM (ohms function) for continuity.
Check your meter for being OK by touching it's own leads together, the needle will basically generally go ALL the way to the right, boucing around a bit you will see due to how firmly they are touching each other.
Google " VOM ohms" usage.
Make sure your leads like DIG IN to make good contact w the element leads.
You will most probably see the needle of the meter bouncing around, not necessarily always all the way to the right, ( 0)" Ohms)
But any bouncing toward the right, as opposed to NO reaction, means your element is fine.
I's either TOTALLY fine, (even if the needle bounces alll over, because that is totally due to the quality of contact you have with your probes) OR --- Totally burned "open" evidenced if your meter needle NEVER moves to the right..
There will be NO "kinda ok kinda not" possibility.
If you need help with that, let us know in this thread.
You can buy an analog VOM at Lowes (specifically) for about $13., it will be useful in the future for a large variety of troubleshooting many different things.
http://www.lowes.com/pd/Southwire-Woods-Multimeter-Analog/999970926
OR ----- Something like this, whatevers more convenient for you to get------------
"Digital" has overall all told NOOOO advantage for anything average person would ever do.
You will highest probability find the element is totally fine.
AND, unless the Garbage Man already took your old one (you said you "replaced) check THAT one also.
Most times, the problem is the connection that needs to be cleaned up and re done, plenty of info here if you search.
It can be other problems, (still not heat with tested OK element) but thats down the road after this is checked.
Marc
Also, somebody will chime in soon directing you to a post about this.
And, I put alot of time into this post to help you.
KEEP communicating here.