"1.The most recent service had to be rescheduled twice! The first time, when nobody showed up or called. When I called, the customer service rep at first said that he could not find a service order, then after additional checking of the computer said that the service was not scheduled for the day I had arranged, but was scheduled one month later! The service was rescheduled for a few days later in the 4-6 pm timeslot, but by 6:10 pm, nobody showed or called. I called and the customer rep was apologetic about the technician not calling or showing, and rescheduled the service again. This time the technician arrived within the timeslot.
2.The service work performed was supposed to be the scheduled maintenance for the AC system. The technician went through his checklist, but did not perform all of the tests that he checked off, and did not perform several as it was described on the checklist. He only worked at the outdoor condenser unit, and did not check the operation of the indoor fan, condensate drain pump, or any other tests on the indoor furnace. Where the checklist said that the condenser fan and compressor should have resistance measured, all that was done was to measure the current, which he commented that it was well under the maximum. This is the variable speed XC-25 unit, which was running at less than full speed as it was not a hot day, so of course the currents were low!
3.There are two long term problems with the furnace system that the technicians have not been able to solve since the unit was installed in 2013. The furnace occasionally (at least two or three times every heating season) will not run, but shuts down on a "pressure switch calibration fault". Over the years, the pressure switch has been replace several times, and the furnace control board replaced this past heating season, but the problem still randomly prevents the furnace from running. Most of the time, the furnace will keep attempting to start, and after some hours it does. The second problem is that the furnace regularly goes into a shutdown on an over-temperature. This may be a design problem, as when the first system was installed (a downflow unit in the garage) it would shut off on the overheat almost every time it started up. The unit was replace with a horizontal flow unit installed in the attic, with extended ducting to reconnect with the existing crawl space ducts. This replacement worked better, but it still seemingly randomly goes into the overheat shutdown mode which is evidenced by the controls locking off the zoning of the system, shutting off the burner, and placing the blower into a higher than normal speed. Since it resets itself after a few minutes, this problem was not readily noticed, but it is still occurring."