It's Never A Good Thing When . . .

 . . .  the heater repair man takes the panel to your furnace off and then takes a step back and says "hmmmm." followed by him reading the panel label for some direction.

 . . . .he tells you he's an out of work electrician and his high school buddy hired him.

 . . . he seemingly randomly disconnects wires, can't tell you why, and then "jumps" them with his own wires.

. . . you find yourself reading the panel label so that you can tell him what to do next.

. . .  you silently realize that he is unable to read, so you discreetly offer to read the panel aloud while he does all the work - just to make things more efficient.

. . .  an hour and a half go by and he still can't tell you where the gas valve to the furnace is located (the panel directions told us to locate various parts).

. . . you find the gas valve and a loose wire and fix the problem yourself.

. . .  his response to you fixing it is: "Whoa!!! That was major!! Good thinking!"

 . . .  he can't put your furnace back together after he took it apart.

. . .  he calls his boss for help.

. . .  he tells you his boss is pissed at him for not being "all professional and shit".

. . . he can't figure out how to put your filter into place.  Ass crack exposed during this procedure.

. . . he muscles on the panels for your heater and in the process bends the panels out of shape.

. . . and rips a huge ventilation pipe from the ceiling.  Huge.  5 ft long and 12" in diameter.  Huge piece of pipe riped away from the sheet metal screws.

. . . you tell him to just leave the panel and the 12" diameter pipe on the ground and beg him to leave before he breaks anything else.

. . .he reassures you that you didn't really need the massive 12" diameter pipe anyway.