Water Leaking Onto Counter Top During Brewing...nearly 2 Cups And Clear.

I have 2 ftx41cp mr coffee makers that leak clear water during brewing. I opened the bottom of one and found what appears to be mineral deposits on the bottom of the heating plate but can't find any corrosion holes. I don't see any evidence of leaking of the hoses or connections to heater unit or anywhere else. I'm capable of replacing the heater units if they are available. I have a 3rd one that won't even heat but will deal with it after getting these two cooking. I am using my latest4th one right now. I really like the machines and would really like them all working. I'm 76 and these should see me through if you can just help me fix them!Thanks,Gary Hilder