Why are service repairmen so dishonest?

I had a technician do my annual furnace tune up a few days ago. I have had no issues with my heat. He does his work and then asks me if I had trouble with my furnace. I said no. He tells me my heat inducer needs to be replaced, telling me it is the "engine" of my furnace. He tries to pressure me to... show more I had a technician do my annual furnace tune up a few days ago. I have had no issues with my heat. He does his work and then asks me if I had trouble with my furnace. I said no. He tells me my heat inducer needs to be replaced, telling me it is the "engine" of my furnace. He tries to pressure me to put a deposit on the new part. I tell him I will wait three days, and see if I have any issues. Well, it s been a few days and my furnace is working fine!!
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