Hello I have a new Goodman 90% efficiency furnace. The induction motor keeps getting water in it and then the pressure switch trips. The drain is not plugged and is flowing good. Any help would be appreciated. Thanks Dan

Check drain and blow clear. Next make sure the drain has a trap in it.

Next question. Did this just start doing this? How long have you had the furnace?

This is the first time I used the furnace , it is a new house. My furnace guy says he has never seen a furnace do this. The drain appears to be flowing a good amount of water out of it. The induction motor exits on the right upper side of the furnace. Where the pipe makes a 90 uppwards, there is a drain tube at the bottom of that 90. The drain tube then drains over to the side of the furnace into a small plastic box (trap). When that fills up, the water then flows into 1/2 inch plastic into the floor drain.

What about the length, diameter and number of elbows in the intake and exhaust?

"This is the first time I used the furnace , it is a new house" so why are you trying to find the fix? The builder and his HVAC sub should be working on this to your satisfaction. How long is your new home warranty? It sounds like new installation that could be faulty or the equipment may be faulty but in any case you do not have to worry about the repair. Exercise your rights.

Your problem can only be caused by the following 2 issues... 1. if you tell us that the vent pipe is draining OK from the inducer, then the only other point that is NOT draining is the condensate from the furnace collector box that the forced draft inducer is attached to. This collector box collects condensation from the secondary heat exchanger and must also drain! If it does not, the water level will rise until it flows into the inducer and slows down the fan... and the pressure switch will not make. Look for a lower hose from the collector and check there as to why it is NOT draining. NOTE: you will have to take the inducer off to empty it of water...

Another point to check is ALL of these drain hoses for PVC chips from cutting the exhaust pipe... is not blocking the proper water drainage out of the unit...

You have gotten some very good advice from several people who know what they say. However, I am still taking the point that you should not do anything at all. New house, new furnace, home warranty, first use... call the contractor or his sub, period. I doubt that you could do anything to void your warranty but why take the chance, exercise the warranty instead.

tsa7man is correct as I have seen this happen personally. So is ballengerb1 which is the route I'd persure if it was my new home...

WELL WE ALL GAVE YOU WAYS TO SOLVE YOUR PROBLEM... that is what this web site is all about... the best is the new warranty / new home issue... take your pick, if it was me, go with the new home... let them fix the problem!! GOOD LUCK... tsa7man

If it's a new furnace make sure the system has been converted for its use. Horizontal left use different drains than horizontal right along with up flow or down flow systems. Most systems come set up for up flow and have to be converted for any other position. If just one hose was not moved for its application it will not drain.

I has the same problem with my Furnace(Miler G6RC). Water would fill up the inducer and pressure switch would be stuck open. It would not reach the set temp. on the thermostat either. When I drain the water; furnace would run an OK cycle but same thing would happen for the next cycle. After draining it so many times I found out that the tube was obviously filled with gunk. Cleaned that out and it seems to be running awesome. And also running up to the set temperature. Hopefully it will help you too and not have to spend hard earned money on the call

I had same issue... check for LEVEL on your furnace. If not level, water stays in fan and motor can not make enough vacuum to close the switch.

I am having a similar problem with my Goodman furnace. Water collects in the blower motor chamber when it rains. The condenser is bone dry and there is not a single drop of water exiting the system from there. Please help... any advice would be greatly appreciated!