I just moved into a new home and I live in hot, humid, Louisiana. We have two AC units, one upstairs and one downstairs. The unit upstairs has a dehumidifier but the one downstairs does not. I have the setting in the dehumidifier upstairs set to 50% per recommendations, but it cannot reach that level. This has the effect that the fan upstairs is always running. The thermostats are both Honeywell T10s, and I am assuming that only the upstairs unit has a dehumidifier because that's the only thermostat where I can change that option.
I have noticed two things, that downstairs it feels significantly cooler than upstairs even when both thermostats are reading the same temperature. The only way I could get the fan upstairs to finally turn off was when I changed the dehumidifier setting to 60% - 65%. I am worried that by leaving the humidity setting at 50%, the upstairs unit will never stop running and drive the unit to wear out quicker and my bill to skyrocket as a side effect.
Both AC units are brand new. Should I reach out to get the upstairs unit looked at? Is 50% humidity unrealistic for hot, humid Louisiana in June?
Thanks for your help!