Click here to Find a Contractor in your area.
Welcome! Here are the website rules, as well as some tips for using this forum.

If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Need to contact us? Visit

Condensate switch failures (Posting here because you folks use these pumps a lot)

This is the third microswitch failure on a Little Giant condensate pump. The last one is less than one year old.

The pump is for a HE boiler and a dehumidifier.

I'm getting tired of servicing this...

What do you recommend?

How about replacing the switch with a reed switch and solid state relay?

I saw a pump without a switch at RE Michael's but I cannot find it online. Anyone have any experience with them? I think it uses a capacitive sensor.


  • SWEISWEI Member Posts: 7,356
    edited August 2013

    Have a couple of these out there for about a year now.

    No complaints thus far.  Nice unit,
  • TonySTonyS Member Posts: 849

    Although I have never used that exact model I have two of their floatless cube units under my mini spits, I have had quite a bit of trouble with both of them, one more than the other. Evidently they try to match pump speed with condensate flow, that produces a lot of noise on a continual basis. Interestingly,I just purched a new Aspen mini white pump that is located externally to the mini split, very similar to the Diversitech style but it uses a standard float and is designed to be easily cleaned. After a delay in this pump arriving it was explained to me that Diversitech just purchesed that division of Aspen. Another problem with the floatless units is they use a computer dc supply that draws current all the time, probably more on standby than a normal float style uses all year.

    Also not to bash on Diversitech but I had one of their standard condensate pumps(the red one) with the float fail. The closed cell foam they use for the float actually became water logged under a condensing boiler and shut down the boiler. I was given another pump and so far so good.
  • John Mills_5John Mills_5 Member Posts: 935

    We seemed to have a lot of problems with the standard Diversitech and the Clearvue pumps. Went back to the Little Giant NextGen which R E Michel has at a great price. No more issues. 
  • VA_BearVA_Bear Member Posts: 50
    Condensate pump on a Condensing Burner

    The condensate from a condensing gas appliance is acidic and some condensate pumps are not rated for that use. If you are using a non-rated pump, you will see failures. So far that and a lack of maintenance are the only common problems I see with any regularity.
This discussion has been closed.


It looks like you're new here. If you want to get involved, click one of these buttons!