It's overflowing where the plastic drain sits inside the 3/4 pvc drain that then drains into the sump.this has never happened before. Any ideas? The temp has been cold outside but it's been consistent.

likely plugged with lint or lime or both. shut the humidifier off for the moment, pour some vinegar or CLR into the 3/4 drain feed, and when it's all gone, flush with clear water. to prevent corrosion of the sump pump, run it or wet-vac the sump, recheck drainage, then put the humidifier line back in and start 'er up.

quote:

swschrad

Thanks swschrad, did what you said but now I have another problem. There was a transformer for the furnace directly under the humidifier drain that got wet. When i turn on the power for the furnace there is a humming/buzzing sound coming from the transformer. I have a fan sitting in front of it but is there anything else I should do? Is the transformer damaged because it got wet?

If you have a float switch, perhaps this is malfunctioning. On my inexpensive dehumidifier, I fixed my problem by putting a chunk of styrofoam inside my hollow float that was leaking and filling with water.

The CLR worked to clear the clog. I replaced the transformer because it got wet and I assumed that's why the humidifier wasn't working but there still isn't any water going thru it. It was working fine b4 I turned everything off to replace the transformer.
Any ideas?

the things I forget are to turn on both the service switch and the water valve. there is either a float valve or an electric valve, depending on who made the humidifier and what their engineering philosophies are, to start the water once it gets to the humidifier. check them.

no, a shorted or open transformer will not kill that electric valve. but lime buildup can. it's basically a pinch valve. a nice, long, dressmakers pin can be a big help here.

Update: I tested the new transformer and it worked. I removed the water valve solenoid to check for blockage and it seemed clear. my last option b4 replacing the solenoid was to replace the humidity control - and it worked! Water is flowing and everything is good again.
Thanks for the helpful replies.