Thanks Noon-Air...
Thats approximately what I do now...
Unless there are records I ALWAYS assume that the HVAC system(s) have not been maintained and suggest a "tune up" prior to closing.
I almost always suggest service contracts because it is not a question of IF a unit is going to hick-up, but when. We have all heard horror stories about the unit that fails on a Friday nite, a wet, cold, long weekend, friday with a party planned for the weekend, and the owner without a contract being told the earliest someone can even evaluate the unit is Tuesday.... Service contracts also mean that the unit will get "looked at" at least once every year, sometimes twice... and I see units that haven't been looked at in YEARS...
If it is "older than the average life expectancy" I call that out... but I am not supposed to use scare tactics... my job is to inform as best a GENERALIST can. There are people on this forum who blast home inspectors routinely because we don't have the experience... I acknoledge that... and say GREAT, give me some knowledge, guidelines, pointers, etc... as I am there to look at more than just the HVAC system. People don't want to call in 4-5 different trades, and pay for them, they want ONE person to give their best guestimation of who they NEED to call in next...
Unfortunately, I am also not in a position to "recomend" system replacement as I don't know the entire story. It rarely makes sense for people to replace systems if they are only going to be in the house 2-3 years. Unless the unit is older than most or in really bad shape, the payback is typically about 4-5 years. Places with high electric rates, or some really cheap units (EER of