Call for heating concern with furnace. Initial observation showed the furnaces filter was being pulled into the blower motor and once removing the filter it was extremely dirty and furnace was fighting so hard to pull in air it nearly pulled the entire filter inside. These 1†filters should be being replaced atleast every two months max. Last filter changed from the history gathered was nearly 2 years ago. Given history of these types of furnaces performed a safety inspection to verify furnace is safe to run and did find the traditional signs of this furnace to have failed, pictures taken for documentation. Given current state recommend not running furnace until it is replaced. Gas for unit shut off at ball valve and electronic gas valve in furnace. Customer is going to have their warranty company give them options about furnace. Be cautious of how they decide to install a new furnace because if they put in a unit that is a 3.5 ton and above and not place it on an airbase with a