Often they just blow on their own. If it is blown be sure to use the new harness that comes with it. Sometimes another part will cause it to go but the only real way to tell is give it a try unless you have a clamp on ammeter.
Flip the breaker to the unit. Then open up the door, remove the fuse and check it with a meter, should be 0 ohms.
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I don't have a meter, but a simple electrical tester. Do I need a meter to debug this[/COLOR]
I would get a meter as you can measure resistance (ohms) which is a lot safer as the power is off. Also it gives more info than what you have.

You can get a decent digital multimeter for under $20.00. You do not need fancy though it is nice if the leads are a couple feet long.
If it saves ordering one unnecessary part it has paid for itself and you end up owning a useful tool.
Most places will not let you return electrical parts so if you order it, you own it.
A couple things to watch when measuring ohms and continuity
1. Always remove power from the machine otherwise you could blow your meter.
2. Always disconnect at least one side of any device you are checking. This eliminates the possibility of measuring an alternate/parallel circuit path.
3. When checking for closed contacts and continuity use the lowest scale (Usually 200 ohms). Then try higher scales. This scale is 0 to 200 ohms so if the device you are measuring is 300 ohms this scale would show an open circuit which it is not, you are just measuring outside the scale's dynamic range.
4. When you start always short the meter leads together. This will tell you that the meter is working and if there is any 0 offset.

There is a good STICKY at the start of this forum about it's use.