On Thursday, August 28, 2014 9:20:55 AM UTC-4, Art Todesco wrote:
Sorry if I posed this before, but I think, when I originally posted it,

the post fell in the bit bucket. So here it is, maybe again:



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?

They probably don't build it in because the existing system apparently
works well enough for most people and there is no mounting, extra work
involved. If I were making them, I'd consider offering an external control
as an optional accessory that you could buy separately and plug in to
the higher end product line. I guess you could include it built-in in
some skews and see how many people buy it. I would agree there probably
is a market for it.