Report back on external dehumidifier control
 

I previously reported that I got a replacement for the old Gree (GE)
dehumidifier. I used the check to buy a Frigidaire unit and a few $$$
to spend. The unit is, as was reported, quiet ... er and others. Its
fan does not run all the time, however it suffers from the problem, that
when it shuts off, moisture on the coils creates a false internal
control reading and restarts. Yeah, it did go through the goofy process
of purging the air, etc. But, it seemed to be running for fairly short
intervals many, many times. I previously reported that I was going to
try an external humidity controller. I bought one of the WH8040 units
on ebay. Of course, it was MIC (made in china), however, I resisted
buying it directly from China. I know, many of the US based sellers are
really just a mail drop and shipping places stateside. But anyway, it's
connected and working. I had to install a small 120v coil relay, as the
internal contacts of the WH8040 were marginal for the dehumidifier load.
I mounted it all in a plastic box and mounted it about 6 or 7' from
the dehumidifier. There is an external humidity sensor and temperature
sensor. After playing with the humidity settings and the hysteresis
setting, I'm happy to say it works great. BTW, I set the internal
humidity setting on the dehumidifier to a very low setting, so that it
will not interfere. It still, sometimes, plays the game of purging the
air, before starting the compressor, but so what. The internal humidity
setting in the humidifier has soooooo much lag. This one works the way
you want it. I can tell it what humidity to keep and how much above
before clicking on and how much below before shutting down. I can watch
the humidity, on the display, go up untile the trigger point, and then
down, to shut off. Now, why don't the build the humidifiers with an
external control?