Goodman - pressure switch/condensate trap

jrmac · 11-29-2007, 03:36 PM

Been battling this issue for a while now and hoping for some advice. Furnace is a Goodman ... not sure of model # (not at home right now ... shhhh! don't tell the boss

)

Problem is that the tubing from the draft inducer to pressure swith clogs with condensate anywhere from a few hours to a few days running time. Clearing the tubing allows normal start up but is a PITA.

Previous advice has been to check drain lines for blockage. All nice and clean with good flow (cleaned trap and lines). Vent pipe does not appear to have blockage with good airflow to outside vent.

I'm guessing at 2 other possible sources of the problem

1. level of the funace from back to front not allowing proper drainage haven't checked this yet so I don't know if it's off level or not)
2. I've read reference elsewhere to having to re-prime a drain trap after cleaning (assume this just means filling with water to the level of the outflowing tubing)

Any opinions/comments on which of those 2 is more likely or if I'm missing the boat altogether?

mrkool · 12-02-2007, 09:06 PM

Well, Goodman told us contractors to strap the tube up so it doesn't act like a drain trap. I've also had to, in different furnace configurations, redrill and reattach the pressure switch tube to a different place and I've used an "airswitch" in place of the pressure switch.
They're small single poll switches whose arm is connected to a small peice of flat metal that when the fan came on, it blew the metal plate, thereby making the switch, worked great for years in old Trane package gas units.

Customerservice · 09-06-2009, 10:38 PM

Quote:

Originally Posted by jrmac

Been battling this issue for a while now and hoping for some advice. Furnace is a Goodman ... not sure of model # (not at home right now ... shhhh! don't tell the boss

)

Problem is that the tubing from the draft inducer to pressure swith clogs with condensate anywhere from a few hours to a few days running time. Clearing the tubing allows normal start up but is a PITA.

Previous advice has been to check drain lines for blockage. All nice and clean with good flow (cleaned trap and lines). Vent pipe does not appear to have blockage with good airflow to outside vent.

I'm guessing at 2 other possible sources of the problem

1. level of the funace from back to front not allowing proper drainage haven't checked this yet so I don't know if it's off level or not)
2. I've read reference elsewhere to having to re-prime a drain trap after cleaning (assume this just means filling with water to the level of the outflowing tubing)

Any opinions/comments on which of those 2 is more likely or if I'm missing the boat altogether?

Call a qualified Goodcare Dealer simply enter your Zip www.goodmanmfg.com

Plumber101 · 09-06-2009, 11:28 PM

Can you post a model number of the furnace?

**beenthere** · 09-07-2009, 05:49 AM

Its a 2 year old post.

Hopefully, the OP got it figured out by now.

11-29-2007, 03:36 PM	#1
jrmac Newbie Join Date: Nov 2007 Posts: 1	Goodman - pressure switch/condensate trap Been battling this issue for a while now and hoping for some advice. Furnace is a Goodman ... not sure of model # (not at home right now ... shhhh! don't tell the boss ) Problem is that the tubing from the draft inducer to pressure swith clogs with condensate anywhere from a few hours to a few days running time. Clearing the tubing allows normal start up but is a PITA. Previous advice has been to check drain lines for blockage. All nice and clean with good flow (cleaned trap and lines). Vent pipe does not appear to have blockage with good airflow to outside vent. I'm guessing at 2 other possible sources of the problem 1. level of the funace from back to front not allowing proper drainage haven't checked this yet so I don't know if it's off level or not) 2. I've read reference elsewhere to having to re-prime a drain trap after cleaning (assume this just means filling with water to the level of the outflowing tubing) Any opinions/comments on which of those 2 is more likely or if I'm missing the boat altogether?

12-02-2007, 09:06 PM	#2
mrkool Newbie Join Date: Dec 2007 Location: Middle Tenn Posts: 26	Goodman - pressure switch/condensate trap Well, Goodman told us contractors to strap the tube up so it doesn't act like a drain trap. I've also had to, in different furnace configurations, redrill and reattach the pressure switch tube to a different place and I've used an "airswitch" in place of the pressure switch. They're small single poll switches whose arm is connected to a small peice of flat metal that when the fan came on, it blew the metal plate, thereby making the switch, worked great for years in old Trane package gas units.

09-06-2009, 11:28 PM	#4
Plumber101 GC/Master Plumber/Mech Join Date: Feb 2009 Location: Hays, KS Posts: 1,467	Goodman - pressure switch/condensate trap Can you post a model number of the furnace? __________________ John Wayne once said "Life is tough and it is even tougher if you are stupid" Tempstar and Trane Dealer

09-07-2009, 05:49 AM	#5
beenthere An old Tradesmen Join Date: Oct 2008 Location: PA Posts: 19,045	Goodman - pressure switch/condensate trap Its a 2 year old post. Hopefully, the OP got it figured out by now.

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Goodman - pressure switch/condensate trap