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All furnaces come with a manual. Most I've seen come with two. One for the customer, which is VERY vague at best. The other has the tech stuff for the contractor. The tech one has all kinds of good info in it. Like the "Sequence of Events". It starts with the call for heat, and then every step after, until it shuts down. It even gives amp ratings, resistance ratings, all the good stuff. Makes it REALLY handy for diagnosis.
I would bet the A/C systems do too. But, as others have said, it isn't rocket science, and it works just like the A/C in your car. No magic wands needed. BUT high pressure refrigerant isn't something to fool with if you have any doubts.
In rick-l's old thread, I can't pay anyone $125 an hour unless the are re-starting my heart, or keeping me out of jail. I just can't do it.
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