We fired our contractor after he lied about replacing/reconnecting the duct from the hot water heater. He told us he had completed this after many requests to do so, and it turns out he did not, leaving it open below and above the shower he was working on. We have since had an HVAC professional and plumber tell us how dangerous this is. He had also failed to fix a leaking shower valve over the course of a week though we told him each time the valve was leaking from the second floor bathroom into the first floor ceiling and each time he claimed to have fixed the leak. At one point he had it duct taped. He lied about ducting the exhaust fan above the shower, instead leaving it unvented above the shower. He was almost finished with the job, though once we realized he had lied and put our family in danger with the hot water heater duct open, we did not feel safe having him complete the work. We now have had a licensed plumber (the original contractor claimed he is licensed but the city does not have any trade licenses in his name) in who has described multiple errors. The initial contractor is demanding payment; we have told him we are needing to have the entire project redone due to the errors he has made and the shoddy workmanship. Once that is completed, we will pay him for the work he actually completed according to the contract, but not for the work he did incorrectly. He is threatening to place a mechanics lien on our property.