Question about Goodman GMS90703BXA Heater

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I had my furnace inspected and the report found elevated levels of carbon monoxide in the draft hood but not in the atmosphere of the structure, what does that mean and why haven't my carbon monoxide detector alerted me of this.

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  • paulcarew Jun 04, 2010

    because it is going up the flue not in too the room have you had it serviced ? or did they do a flue test , what conpany did this ?

  • rcolson121 Jun 04, 2010

    I'm selling my home and this was done by a home inspection company for the buyer and the report didn't say anything about a flue test. I haven't had it serviced for about 2 years.

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  • Goodman Master
  • 2,457 Answers

So this was not looked at by a gas fitter , it might be need a clean which you could advice new owners to do or have it done before you sell,.

Posted on Jun 05, 2010

  • paulcarew Jun 08, 2010

    hi what flue reading did they give you ?

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Carbon Monoxide and Heating Systems


Every year there are many deaths that could be avoided by a few simple checks, or the addition of a carbon monoxide detector in the home. The worst thing is that many of those people will have never known that they were under attack by a silent killer.

One of the products of the combustion of any fuel is carbon monoxide gas. The concentration of this gas can vary greatly depending on how complete the combustion process is. Many heating systems will check the combustion process and shut themselves down if the flame becomes too unstable and begins to produce harmful gases. There also are many heating systems still in service that do not check and will produce carbon monoxide gases. If carbon monoxide gas can get into your living environment then you and your family could be at risk.

To reduce the risk of carbon monoxide gas affecting your home, you should have your furnace checked every year. Make sure that the venting system of the furnace or boiler is in good condition. Make sure that the safety controls work properly and are not bypassed. Never bypass the safety controls to get heat even temporarily. Make sure that if you are using an unvented appliance in your home that you follow the instructions by opening a window a bit to give the heater fresh air. Many of these appliances have a oxygen sensor in them to protect you. Make sure to clean this device yearly and if the heater keeps going out and you don't know why, it could be because of oxygen depletion in the room.

Plugged chimneys, bad vent piping, wrong gas pressures, faulty, dirty burners, and many other things can cause carbon monoxide to build up in your home. Be careful to have all of these things checked often. If you heating system is not acting right then you need to have it checked immediately.

One of your best defenses against carbon monoxide is a detector. I like the ones that actually give you a digital read out of the level of the harmful gas in your home. You will find that even your gas range or oven will produce carbon monoxide and it is helpful to see when even low levels occur. The other reason is because the detectors that only give a warning on high levels will often not warn you till the gas reaches deadly levels. You want to be aware of these levels long before the reach deadly levels. This gives you time to get a problem identified and fixed. Also time to evacuate if necessary.

For best peace of mind, spend the money to buy a good quality carbon monoxide detector and then make sure you get it out of the bag and install it. Get your heating system serviced by a professional that can check the combustion process to make sure your heating system is burning cleanly and efficiently. By doing a few simple things you can protect yourself and the ones you love.

on Dec 08, 2009 | Heating & Cooling

1 Answer

Smell fumes like exhaust when furnace comes on


You really, really need to get your furnace checked by an HVAC (Heating, Ventilation and Air Conditioning) expert. Your furnace has a section where the fire heats tubes that air is blown across then out to your home to heat it. The air in your home and the air from the combustion process should never mix. If you smell exhaust, it's possible there is a breakdown in this part of the furnace and exhaust, which can include carbon monoxide, could be pulled into the air stream and be circulated in your home. Carbon monoxide can and will make you go to sleep and not wake up! Do not use the furnace until you get it checked.

Feb 08, 2013 | Goodman Furnace Draft Inducer Blower ...

1 Answer

PRESSURE SWITCH DOES NOT ALLOW G AS TO FIRE UP FURNACE FOR HEATING. THIS IS A PRESSURE SWITCH WHICH CONFIRMS SMALL FAN IS RUNNING TO CLEAR RESIDUAL GAS BEFORE ALLOWING FURNACE TO FIRE


WRONG!!!! this pressure switch either opens or closes, depends on manufacture, to tell the board that the draft inducer motor is running, if this didnt run and gas light you would probally die of carbon monoxide posioning.

Apr 23, 2011 | Goodman Heating & Cooling

1 Answer

Are there any reported problems with the Firez 21007624 carbon monoxide detector false alarms?


I do not know of any reported problems specific to the Kidde CO/smoke alarm, but I spent a significant part of my career servicing toxic gas sensors and can give you some general advice:

1- Most important: treat an alarm as a REAL alarm and DO NOT suspect that your alarm is a "false alarm". My experience has been that most "false alarms" ARE REAL and the source needs to be identified! With Carbon Monoxide detectors, it is usually a blocked vent for a gas fired appliance- a hot water heater, furnace, or oven. Call your fire department or a service professional to make sure that there is no carbon monoxide. They have portable detectors that will be able to double check your alarm.

My advice to you at this moment is to act as if you have a real alarm condition and do not place you or others in a life threatening situation. Ventilate the room/ apartment/house IMMEDIATELY!

I will post more after I send this because you may be in a life threatening situation!

Mar 22, 2011 | Kidde Firex 21007624 Ac Carbon Monoxide...

1 Answer

Nighthawk Combo Gas/co Detector: is 218 a high read of carbon monoxide levels in a ...


A reading of 218 should be treated as an emergency. When a Carbon Monoxide level reaches over 70 ppm, you should have a professional inspect and repair the appliance that is causing this issue.

Carbon monoxide levels above 70 ppm will cause headache, fatigue and nausea. Levels above 150 ppm can cause serious injury or death.

Read section 5 US Consumer Product Safety Commission.

May 17, 2010 | Kidde Nighthawk Combo Gas/co Detector

2 Answers

I have a goodman gmnt 100 b furnace 2 stage when the gave valve turns on and floods the heat exchanger with flame then the squirl cage fan turns on and i loose the the flame


If you are getting flame distortion when the blower comes on it usually means a cracked heat exchanger which can lead to carbon monoxide, get your furnace checked by a qualified tech..

Jan 31, 2010 | Goodman Furnace Draft Inducer Blower ...

1 Answer

How does a draft inducer blower work


A draft inducer blower is used to create a proper draft in a chimney or exaust pipe from your water heater or furnace. In a high efficiency furnace or water heater, there is not enough heat expelled from the unit to the chimney to create a proper draft. The toxic carbon monoxide gas which is expelled through the chimney from your appliance is normally carried upward due to the rising hot air in the chimney. When appliances got more efficient (putting more heat into the water tank and less going out the chimney), manufacturers had to add this blower to help get the gases out the chimney since there wasn't enough hot air to create a draft.
Hope this helps.

Dec 10, 2009 | Fasco GSW Hot Water Heater Exhaust Draft...

1 Answer

My carbon monoxide detector keeps beeping in spite of replacing thebattery and gives an error code of E09. Also it keeps flashing an err on the led redout. I placed it outside and it is still doing it...


Hopefully you have found a solution for your Carbon Monoxide Detector issue of October 4, 2009. The best solution for a questionable CO dectector is a replacement.

A Carbon Monoxide Detector is the only thing that will read, detect and sound an alert when reads dangerous levels of CO levels in your house. A defective carbon monoxide detector will give you and your family a false sense of security and will give you no protection.

Whenever in doubt, always err on the safe side and replace Carbon Monoxide Dectectors, your life depends on it.

View my website for related information and compare brands and models of Carbon Monoxide Detectors available for sale online.

Oct 04, 2009 | Kidde Nighthawk Combo Gas/co Detector

1 Answer

Black film from furnace/AC


I would be concerned that exhaust is not venting properly and the soot is getting into the fresh air side of heater. Have unit checked for carbon monoxide presence in fresh air ducting. Heaters use a heat exchanger the is heated by the furnace and fresh air is blown through yje exchanger to be warmed before it gets out the vents. If the exchanger is damage or rusted through the good and bad ai can exchange creating a serious/ life threatening condition. I recommend professional inspect and repair and have a carbon monoxide detector in place and functioning. Be safe and good luck

May 16, 2009 | Heating & Cooling

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