We are at wits end with our heat pump bought new in June 2007. I will try to keep this short but explain the situation as best as possible.
The unit is a Trane XL16I and was installed with a Trane 2/4TEE air handler. We also have a Trane TCONT802AS32DAA stat.
To start, this unit has the new type Freon in it. But when the unit was installed, I noticed the tech had the old style (R22) Freon tank hooked to the unit and was filling it with the wrong Freon. He corrected the problem and put R410A in the unit. Could that cause a problem with the unit?
The service company has made numerous trips to try and get this unit to heat and cool as expected. Over seven visits in 42 months.
The house is a 2200SF ranch with double pane windows on a slab. I added insulation to the attic right after we bought the house and we now have 18” to 20” all through the attic. For the summer there is a power attic fan.
The compressor has been changed, defrost board changed and heat strips have been changed during service calls.
After all the above during one heating event this winter the stat was sit to go to 67 and then bring the house back to 69 at 3:30pm. At 4:33pm the temp on the stat was 66. At 5:16pm it was to 67 and at 5:31 it was still at 67. The unit was running the whole time. The unit did not get the house to 69 until 6:00pm. The outside air temp was 38 degrees on a calm day.
Most times the output air is 80 and the return is 68. If the unit kicks in the aux on the stat the output will rise to 100.
In the summer cooling season the unit struggles to keep the house 76 degrees. If it gets above 90 outside, that’s when the temp will rise to 78 or 79 in the house.
Something just doesn’t seem right?!!!