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This dryer has a blower that is belt driven (part number 8544742). The first thing I recommend checking is the blower belt. I am including the disassembly instructions for this type dryer in the images below.
Always unplug or de-energize electrical equipment before removing covers or attempting service. Be careful and wear appropriate hand protection when working around sharp metal parts.
If you do not feel confident repairing this problem yourself, then you can have it repaired at your home by a Sears technician. Here is a link for the website:
Sears Home Services
Here is a link that you may use to view the parts list diagram and for parts purchases;
Sears Parts Direct
I hope this is helpful. Check the things I have covered here, and if I may be of further assistance, include more details, in a reply to this post.