We recently purchased a home and  one of the larger issues we came across is that we believe the seller had used their own hvac workers to 'repair' our furnace to get it into 'operating' standards. However, we had a hvac team come out and re-inspect the unit a couple of days ago and commented that the unit had a safety/limit switch that was bypassed. We've been having issues turning the heat on and off over the last few days so this makes sense. Is the best route to submit a complaint for compensation? Is it even possible to receive compenstaion for replacing the furnace unit to properly heat the house? 

During the purchase process our inspector had not caught mentioned we needed to get a second opinion. We brought out an hvac tech out for an inspection and they quoted in their inspection nothing in regards to the limit/safety switch being bypassed or any hazards related to this. However they did note that the unit does not work and needs full evaluation. The seller made updates to the unit after we had shown what the hvac team had found in order to get the system to be operable. It's during this time we believe they had made the bypass in order to get the system to work temporarily...