Humidifiers and Dehumidifiers - Humidifier wont stop leaking

Hi, we have a Hamilton model 10 HF flow through humidifier on our furnace, it leaks. I had it turned off for a long time, we opened it up this winter and changed the filter. I figured that the tube going to the condensator pump was pressurizing because the water seemed to bubble up at the top of the tube and not flow, and it would leak from the edges of the humidifier. So I poked a small hole in the tube above where the water flows down it and it seemed to work, it flowed freely. A couple months later I noticed that the floor was wet and water was backed up in the tube half way above the condensator pump. The water was still running freely from the humidifier, but the humidifier itself was also dripping excessively. I figured the pump may not be working properly so I detatched the tube from the pump and ran it to a 5 gallon bucket. It still flowed the same, and was still dripping like crazy from the humidifier. A couple hours later I found the bucket was overflowing. I didn't think it would fill that fast, it seems that theres way too much water flowing through the humidifier. (The humidifier does turn off and not leak when the furnace turns off.)

I am wondering if I should go out and get a new humidifier? I don't want to buy a new one if I could just replace a malfunctioning part in it. What part? And do you think the condensator pump should be replaced, or is it that it might not have been able to handle the large flow coming from the humidifier?

You dont say how old it is. But most of the time I find it best to get a new one and put it in . Than try and fix a old one.

Yah its pretty old, from when the house was built in 1993. It has never worked without leaking for us since we moved in 2003. I will have to replace I guess.
Thanks