Residential HVAC sales can be a pushy business at times. Pushy because techs are trained to sell rather than service.
Why is this? For profit I would imagine but we can generate nice margins by understanding the trade deeply and applying skill to seek out actual problems and recommending actual solutions.
Check out Jobber www.getjobber.com/hvacknowitall
Check out the article Gary McCreadie wrote on this subject.
https://hvacknowitall.com/blog/the-truth-about-furnace-tune-ups
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