Model NTGM100EHA3

[mitrodus]

Inever had problem with my furnace till two days ago.It'sKeeprite vertical and I found that some water is coming inside of it.My condesation hose is not blocked and on the bottom of furnace,metal one,there us a wetness but water is comming out of it and into drain.That's only happening when the heater is running.Can you help to tell me how or what to do in order to stop the water going wrong way.Thank you Dan

[how]

Despite this being a DIY site, this is where I'd suggest getting in a pro to check out your exchanger. Ask your neighbours for who they've used and been happy with.