I worked for a heating company for almost 2 years , I have 20years experience in the trade . I noticed they were treating me different within the last week of working with them, when my benefits were terminated before I was let go I asked the owner if I was being fired he said "no". I know why he told me it because I was on call for the company and union gas at the time, he waited til I was done being on call. So my question is I was let go in February 2016 how long do I have to file and do I have case? Thank you

Generally speaking, you can commence proceedings against an employer for wrongful dismissal up to two years from the date of your notice of termination.
That said, if you were let go in February 2016, I would recommend that you contact us right away. You may be owed significant compensation.

To find out how much you are owed, visit our Ontario Free Severance Calculator (http://www.severancepaycalculator.com/). If you have been paid less than what is showing on our severance calculator, please give us a call at the number below for a free consultation.