Weissers Heating & AC

I give this guy 1 star because it doesn't allow me to give him less than that. He did some furnace work for my elderly, widowed mother. A month later he sent her a bill according to his quote and she paid it. Six months later he sent her another bill with additional charges for several hundred more dollars?...When she questioned him about the charges he showed up at her front door and like a crazy man was acting as if he may actually become violent. He filed to take her to small claims court, and she eventually just paid him, to get him to leave her alone. This man is a psycho and truly needs help. DO NOT LET HIM ENTER YOUR HOUSE!!