OP seems to have clearly stated he was paid to fix the furnace so it worked, not fix, clean and make them purr like kittens by the time he left. This would involve not only fixing the problem but additional work disassembling the intake and output vents to make sure they were not in anyway obstructed throughout, cleaning and/or replacing or suggesting the filter be changed, entering the fan chamber to lubricate the fan motor and if an ac combo unit, checking the ac charge level and verify the coolant unit inside the duct had no corrosion check that the furnace burn chamber had no severe rust that would indicate failure or fire sometime down the road and check the igniter and firing of the gas for proper operation. Do you even have a clue how much longer doing all this would take and cost employer to pay him to do for free?


Quote Quoting llworking
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Where do you get that? A furnace tune up is a furnace tune up. The difference is sloppy work vs thorough work.