Question about Goodman GMS90703BXA Heater

5 Answers

Ignitor glows, but no gas

I had a friend install my new Goodman GMH950904CX 95% 92,000btu 2-stage multi speed furnace. At the same time, he installed a new A/C system (Goodman condenser and a-coil matched to furnace). A/C works great. The furnace, while I don't need it right now, won't work.

When I switch the thermostat to HEAT and turn it up to 80 degrees, the inducer fan comes on, then the igniter glows, then .... nothing. The igniter dims, the fan shuts off, then it starts all over again. There is no "click" in the valve, leading the installer to believe the valve may be bad. How likely is it that a brand new unit would have a faulty gas valve? Is there anything that could have been overlooked in the installation that could cause it to not get gas? Is there any way that I can test it? My friend has installed heat and A/C before, but doesn't have formal training or all the tools that an HVAC contractor would have. I will call a certified contractor if I have to, but I have very tight funds right now and would like to avoid it if possible. Thank you in advance for your help.

Posted by on

  • timk1 Sep 26, 2008

    I have a similar problem. GMP075-3 about 10 yrs old. Runs fine most of the time however, intermitently will do the same click to ignite. I have not found any consistent solution...sometimes banging on the gas valve before the unit shuts itself off works..not always. Sticky gas valve? How do I resolve (take apart and clean?)



5 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I found that my exhaust pipe was installed with 2 90 degree elbows outside the house. The pipe was making a gurgling sound so I drilled a 1/4" hole in the bottom elbow and got a cup or so of water out. Furnace works fine now. Why is this elbow setup used - it's perfect for trapping water and obstructing the vent.

Posted on Feb 07, 2009

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;}Goodman vertical forced air 69,000 BTU gas furnace GMH950703BX

My gas furnace has a small to big problem. When the t-statcalls for heat the furnace clicks, The vent motor blower comes on, the ceramic electricigniter comes on, the gas to the burners start to flow then it likemisfires" or “burps several times” like gas is there but not enough orsomething like that, hard to explain". Then the main gas source stops and the vent bower runs back up andignition glows and tries the cycle again. The furnace then will start thisprocess over and most of the time it takes like 40 times before it fires and 10%of the time runs normal. The light onthe controller board (Emerson) stays solid lit. No blinking indicating a problem.

Steps to resolve:

  1. Disconnected the pvc exhaust pip to see if there was any back pressure on the exhaust at that level. – No change in status. Did seem to increase maybe the likely hood of an eventual long burn cycle. It appears that if its going there is a chance that reconnecting it makes the gas flow stop.
  2. Intake removed and the top door opened, this did not seem to have an impact.
  3. Removed the lower door and this seemed to help a little bit but not much. Longer burns to 45 seconds then shut down.
  4. Removed the Gas Flame sensor and cleaned lightly with steal wool and reinstalled. No change in status.
  5. Filed top ground green lug, attached on burner flange assembly. No change in status.
  6. Checked continuity on gas flame sensor wire from sensor to controller. .02 on meter
  7. When open exhaust is present the system definitely works longer. While burner is running lit, slowly place hand on exhaust port and that appears to trip it in the same manner when its fully exhausted.
  8. The two pressure switches are as follows: (35) parts diagram = B1370158
Left sideconnected to low end of “Flue collector Box Kit” – -0.37 PF SN:20197312 model: 9371VO-HS-0016
Right sideconnected to 11:am on the “Vent Motor Housing” - 0 95PF SN: 0130F00002P Model: 9371VO-HS-0097

  1. Went to Econotemp ( a local DIY HVAC contractor that allows for the public) and they felt it was being obstructed for exhaust via water accumulation in the Flue Collector box. Further research of similar Goodman manuals, including mine, show that the tan elbow with the orifices for condensation being on the tail extension and not on the upper inside elbow location that was currently hooked up. Disassembled the vent motor from the flue collector box and had about ½ cup of water sitting in the black plastic fan housing. Examination of the tan exhaust condensate assembly reveals a poor design. The drain in a vertical position, likely 95% of the time, should be on the long tail and not on the upper inner elbow. The small upper condensate drain is inter-connected to the long tail inside the tan elbow housing and is not readily visible. This would allow for condensate that comes back down on the center edge of the pipe to catch and the condensate that takes the easiest route of least resistance to go into the long tail. If the water rises in the tail it would have to flow over the spillway into the vent motor housing if it is not drained at the bottom of the leg which has no orifice. Therefore decided to back/re-engineer the drain system with quantity 2 - 1.2 brass barbs - one being male threaded the other female and aviator straps with clear hose to the regular existing drain. Ended with the old black condensate hose not being used. Tested and it did not back fire “burp” once. Further time testing needed to see if condensate stays out of the vent motor housing.

Posted on Oct 29, 2008

  • Level 1:

    An expert who has achieved level 1.


    An expert who has answered 20 questions.


    An expert that has over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 22 Answers

Goodman are know for the bad pressure switches, First off is there water in the pee trap" lil grey box on the side of the unit"? if not that is your problem they " Goodman" use the water as a vaccuum for suction on the 95% furnace, IF there is water i would check the pressure switch in the top left corner should have 3 grey wires coming of of it, rmove the rubber tube from the secondary exchange " big black box bottom of the burrner area" blow and make sure it is no plugged. Second blow softly into the pressure switch reconncet and try if blowing into switch works that you got bad pressure switch.

Posted on Oct 11, 2008

  • Level 1:

    An expert who has achieved level 1.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 5 Answers

I think More likely it is a vent fault... not getting proper exhaust so the exhaust pressure safety switch will not allow gas valve to open. Could be due to improper sized vent pipe.... and/or blocked outlet outside ( I once had a chipmunk put a scrap of food on top of exhaust outlet! causing same problem). Also Check that vent is sloped back to furnace and that it can drain away any condensation that forms in the pipe.

Posted on Oct 02, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 1,420 Answers

Most likely either a bad board or no gas to gas valve. Bleed out all air in the gas line. Check for 24 volts at both gas valve and circuit board terminals leading to gas valve. No voltage = bad board.

Posted on Jul 25, 2008

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Repairman can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Repairman (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Goodman Model GMV950905DX-an electrical surge burned out the transformer which I replaced, also replaced the circuit board. The variable speed furnace will no longer kick into high speed and it will l

If I remember correctly, there are dip switches on that control board that can be set individually. It is possible that it is just a setup issue. The switch positions should be explained in the installation instructions. I know that some Goodman and Amana two stage furnaces can be controlled by a single stage thermostat, but the dip switches have to be set properly. If the switches are set correctly the furnace will run in low stage heat for approximately 5 minutes and if the thermostat hasn't satisfied yet, it will kick in to high stage heat. I hope this points you in the right direction!

Dec 16, 2014 | Goodman Manufacturing Goodman Gas Furnace...

1 Answer

New furnace, Water In Induction Motor, Yellow Flame

The problem is too much gas as opposed to not enough air. It is still running rich. Did you take into account the elevation of the location your furnace is installed at. The higher above sea level the less air that you have to aid in cumbustion. The condensation is from excess gas being cold and causing water to accumulate. Can you run it like this? Yes but it will cause issues with soot and carbon deposits. It will also cost you more money in the long run.

Dec 23, 2013 | Goodman Manufacturing Goodman GCH950453BX...

1 Answer

Ignitor glows but no flame

It could be clogged gas line or valve or main valve or control board or dirty nozzle and best way is get help from local service centre

Dec 08, 2013 | Amana GMH81405DN 140,000 BTU 80% Gas...

1 Answer

Model gch90703bxab

There could be other problems but check and see if your igniter is not burnt out. Ours did that and tried to ignite for two days and then I found I had to change the igniter.

Dec 05, 2017 | Goodman Manufacturing Goodman GMH950704CX...

1 Answer

The Goodman Heater was installed in 2004. Thermostat set at 75F, the fan that blows CO2 out was on for about 1 minute, then I could hear the sound of the gas blowing into the furnace, but the ignitor...

Problem: Your furnace will not ignite the gas to produce heat for your home. When a furnace has a bad ignitor what I see most of the time is the following sequence of operation:

1. Thermostat calls for heat. 2. Draft inducer motor starts. 3. Pressure switch attached by a small plastic or rubber tube senses the negative pressure produced by the draft inducer and closes. 4. Draft inducer runs for 30 seconds to a minute before you hear a gas hissing sound. The ignitor did not glow, the flame sensor (a small metal probe about 1/8" in diameter, with a white porcelain base) does not sense the flame, so after 8 to 10 seconds the hissing sounds stops with no ignition of gas to heat your home. Your furnace shuts down and goes into a lock out condition until you turn your power switch back off and on again. Then the sequence starts all over again with no ignition of the gas. Solution:You probably need to purchase and install a new ignitor. I would suggest that you inspect your ignitor closely for cracks. Make sure you do not touch the ignitor with your bare hands. If you do not visually see a crack, then you could have a furnace control board problem or a limit, rollout switch problem. The furnace's control board might not be supplying the voltage to the ignitor. If your furnace lights and the gas stays on for 8 to 10 seconds, then shuts right back off, then you need to clean your flame sensor with light sand paper or steel wool. You might need a new flame sensor, but most of the time they can be cleaned an will work well after cleaning.

Nov 30, 2010 | Goodman GMS80903BNA Heater

2 Answers

I had a friend install my new Goodman GMH950704CX 95% 92,000btu 2-stage multi speed furnace. When I switch the thermostat to HEAT and turn it up to 80 degrees, the inducer fan comes on, then the igniter...

he didnt hook up the secondary heat exchanger drain properly. common mistake and he probably threw away the bag of parts to do it which came with the furnace . loook at your installation instructions

Sep 29, 2009 | Goodman GMS90703BXA Heater

1 Answer

How to manually relight a Goodman® GMS9/GCS9 Single-Stage, Multi-Speed Gas Furnaces

You should NEVER attempt to relight manually this furnace. Serious burns could be the result. This furnace has an electronic ignition and should light by itself. If it does not light you may have a bad ignitor. These are usually around 30-50 US dollars.

Jan 28, 2009 | Goodman GMS90703BXA Heater

3 Answers

I need to remove a goodman ignitor B1401015.

The gas pipe should have a union and shut-off on it. Turn gas off and spn out the gas line. Re-install using pipe dope and check for leaks.

Nov 21, 2008 | Goodman GMS90703BXA Heater

3 Answers

Goodman GMP075-3 ignition problem

Goodman gmp075-3 gas furnace and the flame cycles for 4 sec

Oct 01, 2008 | Goodman GDS80904BNA Open Flame Heater

Not finding what you are looking for?
Goodman GMS90703BXA Heater Logo

1,563 people viewed this question

Ask a Question

Usually answered in minutes!

Top Goodman Heating & Cooling Experts

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Paul Carew

Level 3 Expert

3077 Answers

Tim Whalen

Level 3 Expert

3074 Answers

Are you a Goodman Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides