I have a carrier infinity system with variable speed blower, it does not seem to be dehumidifiing.?

Question

I bought an entire new system for my house last year. It is a carrier infinity system with variable speed blowers (Top of the line). I can't seem to get a straight answer out of my contractor. Indoor humidity reads 62%, I have the system set to dehumidify at 46% (Lowest Setting). The system works at cooling, but once it reaches the set temperature, everything turns off. Shouldn't the fan keep blowing to continue to dehumidify even though no more cooling is required? Both the fan coil and condenser is quiet. Carrier boasts efficient humididy control, so I am surprised this is not working.

Answer 1

If your indoor humidity is actually 62%, then you can probably not reach your humidity set point without over-cooling the space. More than likely your unit is oversized for the space and can reach the temp setpoint long before reaching the hum set point. Running the fan will not dehumify if the coil isn't cold. So, I would go back and look at the size of the unit for the space and whether you have the ability to mitigate excess humidity from entering the space. Otherwise, try over-cooling the space to lower the humidity, then let the temp rise back up.