Go here and follow steps to remove blower assembly housing:
http://www.mobilehomerepair.com/article ... lower.html
Then you can lean in and look down to see if any coils have fallen and are touching frame or other coils.
IF t-stat is disconnected and t-stat wires disconnected and it clicks when breaker is on, there is a short circuit and above is most common one.
Turn breaker OFF until resolved as it could cause a fire.
IF a coil has fell, you can remove the element drawer assemblies after marking where wires go and disconnecting.
Sometimes they just fall and can be reinstalled correctly.
The rods at back go into holes in back wall to hold elements.
Make sure power is OFF before doing any of above mentioned things.
Some people are Humbly Grateful, while some are Grumbly Hateful.................... Which one are you ?