Completed with heat 3 2015 upstairs ac combo 2.5 ton with 20 year old upflow furnace in attic, 3 ton master bedroom 2019 gas horizontal in attic and 2.5 ton 2018 downstairs. Found upstairs 2.5 ton not heating due to a bad circuit board and pressure switch, also rollout switches showing wear, blower motor has oil stains and heat exchanger has corroded spots. Giving customer the option to do all preventative repairs, minimum repairs or furnace upgrade. Customer wants to replace furnace but need to talk to wife before making any decision.