Is a follow up call after an interview always a good idea?

Yes. The job interview follow up call is always a good decision, so long as you know how to conduct the call politely and appropriately. The one exception is if you hear from the job interviewer before you have an opportunity to make the follow up call five to eight business days after your interview. If you do not hear from the job interviewer in that time, making a follow up call can demonstrate your enthusiasm for the position and remind the job interviewer of your interest in the company. The job interviewer may even be waiting to hear from the applicants before she makes her decision.