Not sure how to handle tenant issue

[Chris Pasternak]

Hello, 

Longer story-short, I have a tenant that put in a complaint about a furnace in March.  My partner, who was the PM at the time, who has since exited the picture, sent out a technician to repair the furnace.  Apparently the repair did not help.  Now we are here in May, the tenant is not paying rent because the furnace is brokebroke, and I'm stuck as the PM.  The bigger issue now is after an initial phone conversation with the tenant, I said I would get back to him with a repair time.  Since then, he has not responded to me.  I've tried calling him several times and texting now too.  No response.  Its been 2 weeks since I heard from him.  

He is delinquent 2 months rent and coming up in 3rd month delinquency.  

Should I try to send certified mail in an effort to contact him?  Start eviction?  What to do?  

Really sucks because my biggest mistake was a failed partnership.  Now I have to fix this mess.

Thank you for any words of advice.

[Bob B.]

@Chris Pasternak

You have bigger issues than a furnace not working when the AC should be on.

The tenant is using this to not pay you.  Start eviction asap.