First, let me say thanks for having a forum such as this.
We built a new house last May and had 2 Goodman split units with variable speed air handlers installed. This is the first variable speed unit I've experienced so I have some general questions. The reason for my questions are that the two units have different characteristics.
In A/C mode the upstairs fan blows pretty hard, but the downstairs fan blows about half as hard. They both cool as expected. Why the difference?
In the heat mode the upstairs fan still blows pretty hard until it goes into defrost mode then it really sounds like a turbine engine, but the downstairs unit never seems to operate the same. Sometimes, quite frequently lately, it comes on full blast in the auxillary mode for about 10 minutes, then clicks off the auxillary mode for 10 seconds, then clicks back into the auxillary mode for 10-15 seconds before clicking back off auxillary again usually for good. After that the fan speed goes down to about half speed for a few minutes, then goes back to full speed again until it cuts off. Now all the time the digital thermostat is set at 69 and never gets below 69 nor does it go above 69 at the end of the cycle. Other times it comes on normal heat mode and the fan is about half speed until it goes into defrost mode then the auxillary kicks in and the fan goes to full speed. Does this sound like normal function of this unit? Also, should the unit go thru a defrost mode every time it runs?