Sounds like your heating coils have burned out.
The model number you provided is not showing as a good number. Please check the number again. There should be three digits then a period then 6 or 7 more numbers.
Like this xxx.xxxxxxx
The first three numbers may be faded look closely.
Ok got it, Molly. it is a 110.96573220
The part you need is available through Sears either on the web or at any Sears outlet. The price is $53.25
You can order it on line by clicking here.
Any good handy person can install this in about 1-2 hours.
Please post any other concerns here.