Sign up 2 comfort club membership. Complete 1 system furnace repair and preventative maintenance check. Change filter, check safety and operations. Find upstairs heating not operating due to burnt gas valve. Needs to replace a gas valve and calibration service. Find a downstairs heating system operating with badly worn ignition and high oxygen level. Find both evaporator coil rusted and upstairs air distribution box molded. Suggest air purifier system. Customer want to wait to repair system. Upstairs have no heating at this time. Give customer estimates to repairs.