Three years ago we had an AC company install our new AC, we signed a contract that the work would be completed in three months. We’ve had nothing but problems with this company, not finishing the project, not returning our calls and he finally came out and told us he was charging us $1500 more to fix the reason the unit wasn’t working. We said we were not paying it and that he broke the contract. He never put in the warranty info for the units, so we put in the dates online as the owner and called another company come out to fix it under the warranty. This was last year. Now he shows up out of the blue the other day wanting money and threatened to put a mechanics lien on our home and says he will ‘double the amount because we haven’t paid him the rest of his money plus the extra he tried to charge us…..what recourse do we have as homeowners who were left with this guy threatening us like this after such a long time? It’s been a year since we had the other company come out, so isn’t the time frame past that he can even file a lien, and didn’t he break our contract in the first place? Can he make up dates and paperwork to file? He has never sent us anything in writing we only have the original contract….thank you for your help.