Does a rental have to be occupied for a 1031 exchange

[Jack B.]

I lived in the house bought as a primary residence for 1.5 years. Rented it out for 4 or so years after. Moved back in for 2 years with the intent to rent it back out after I moved back out again (moved back in after I sold my other house I was living in). It's been listed for 2 months and all I get are around 500 credit score applicants now. Wasn't like that before. Never had any vacancies even in winter. 

So I'm wondering if it just being listed as a rental the last two months combined with it being a rental previously qualifies it as a rental for 1031 exchange or not.