Furnace check up on twenty year old system. System wasn’t operation correctly. Owner replaced thermostat himself and couldn’t get system on. I was able to turn on system and after I cleared every error code. System gave me a new one after clearing each one. I found a faulty blower motor, a motor control reading low, pressure switches that didn’t close. I brought all these issues up to owner. He agrees to just replace instead of put money into old system. Only charging for diagnostic today, and supervisor will arrive on Wednesday from 9-11am