Examples?

One I fixed:

Customer complained unit did NOT work at all! Worked the day before,
but today - nothing. I went around to the back and found the AC plug
for the AC outlet lying on the floor. Plugging it in, worked fine.
Seems the clean up crew had unplugged the unit, moved for cleaning,
put back, but neglected to re-plug it in.

Good laugh, no charge.


One somebody fixed for me [this was SUPER embarrassing]

During a very cold December, we recently moved into a new home with
two zones/units for thermostatic control. The heating would NOT come
on in the master bedroom and auxiliary bedrooms [both along west side
of home adjacent to Kitchen and Family Room] so we were freezing
either while sleeping or in newly established office. I turned on and
off each of the two thermostats which clearly activated two sections -
an 'in-law' section in the north end of home and the kitchen/family
room in the south end, but still not the MB section! We froze, so I
turned the unit on in the kitchen/FR area so that heat could 'leak'
back into the MB. Those rooms were HOT. MB tolerable. I even went up
into the attic to find the two units, but the one feeding the MB would
not run at all!

Upon calling furnace repair. He had to drive a long way to rural home.
He walked in. Turned on/off the two units I had worked with, verifying
they were functioning. Then, he went down a small hallway outside
those auxiliary bedrooms, found another thermostat on the wall and
turned on the third unit!!! ...I didn't know there were THREE zones!
Simply assumed there were only two zones [from memory description of
house] - verified by trip to attic where saw the 'two' units. Never
saw the third thermostat!

He laughed for the longest time, and said he just didn't feel right to
charge for 'turning on the thermostat' and left. Proving what goes
around comes around. Needless to say, they're our repair service from
then on.

PS: I promptly moved a new thermostat from the hallway to the MB where
it really belonged! After all, this hallway was heated/cooled by the
unit that ran the kit/FR, so the two would constantly conflict. Left
the thermostat on the hallway wall simply to 'read' the temperature.