Completed with heat 2 on 2005 Goodman gas horizontal in attic 3 tons. Both units heating at this time of check up. Found flame sensors, ignitors, inducer motors showing wear due to age, blower motor showing wear as well, no secondary float switches, no gas sediment traps and dusty ducts also upstairs unit is not cooling with a 9 delta t, is low on r22.. Giving the option to do all preventative repairs, minimum repairs or complete furnaces upgrade along with duct cleaning. Customer is not interested.