Question about Goodman GMS80903BNA Heater

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The air flow sensor gets clogged with dust

The air flow sensor orifice gets clogged with dust several times each winter. This sto the flame frfom coming on. Cleaning the orifice of dust eliminates the problem immediately.

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The dust needs to be cleaned often to avoid the problem, noting else.

Posted on Jun 21, 2009


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1 Answer

The pilot light flame goes in two directions. Up towards the main burners and right towards the thermo; but the flame does not reach the thermo

If the flame is not reaching the thermocouple, then the flame orifice probably needs cleaning. Turn the heater off then use a small soft wire brush to clean it, then blow it out with compressed air. If you do not have an air compressor, use a can of air that is used on computers.

I usually clean the pilot light orifice and burner tube on my heater every year just before I start using it for the winter.

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Why does the mass air flow code comes back after replacing the sensor?

Mass Air Flow sensor just measures incoming air flow at a predetermined rpm/load. The computer is saying the flow measurement is not correct. This can be caused by mechanical faults within the engine like a bad valve seat or timing chain but would generally be accompanied by backfires through the intake. Usually its caused by a vacume leak between the sensor and the intake valve,like the intake manifold,loose intake pipe clamps, broken vacume lines,a leaking vacume brake booster [it will hiss loud when you apply the brake],bad spark plugs/wires, a clogged catalytic converter, stuck open egr valve or pcv valve,bad oxygen sensor or even a very clogged air filter. I know there is a lot listed but the MAF or MAP sensors show general flow through the engine that can be affected by several things. A vacume tester from your local auto parts store is about 30bucks and usually has instructions how to test for vac. leaks within the engine also to determine a if thers is bad valve seat or clogged exhaust.

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My gas log fireplace runs for 2 to 6 minutes and then quits on its own. It is 10 years old. Any suggestions?

Look for a flame sensor, It is a wire that is has to sit in the path of the flame. IT is gets dirty and can cause this. You can clean it with scotch brite pads

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I have an indesit cooker both gas and electric and when am using gas it produces poor quality fire which causes soot onto saucepans. please help

Soot is unburned carbon in the gas and is caused by the flame being short of oxygen. The burner assembly may be dirty or your air adjustment is off. Once a burner starts to make soot, it gets progressively worse on till it is repaired. The first thing to try is a good cleaning. If that does not solve it, look for the air adjusters. They should be near where the supply gas line meets the burner orifice. open them a little at a time and watch the flame for change. More air should clean up the cabon. Also check the gas pressure regulator for proper adjustment. It could be set too high. Let me know how your doing, OK? Roger

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1 Answer

I started up the barbecue for the first time to get all of the winter crud off, and when I start it only the outside burners will flame, the middle one asks like its starting but then burns out?

Probably some of the winter crud has clogged the burner and or the venturi valve. Remove the burner, clean it and check the venturi valve for spider build-up. Wouldn't hurt to check the burner orifice too.

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Heater starts to pull in fresh air, then most times turns off. Sometimes it will ignite and run fine, mostly it just turns off. It runs on natural gas, electronic ignite. Could it be a air sensor? I...

Hi, and no it would not be any clogged lines. Not knowing if this is a split system, or a package unit, I will say by what you are saying it is a split, indoor unit, and outdoor condenser? You have what is called a flame sensor located next to the electronic pilot. When the pilot ignites, it surrounds the metal tip of the flame sensor. It then heats up sending a signal back to the ignitor module or board which ever you have telling it to fire the main burners and heat. If this flame sensor gets dirty, from dust, carbon, ect, it will fire then run for a few seconds and shut down. Most lay right beside the pilot back under where the pilot is. The body is normally made of pocelin with a metal tip that has a angle to it. Take a piece of sanding cloth, steel wool and clean it. This should take care of this problem. If it continues to do this after cleaning the sensor, make sure that the small inducer motor comes on first, then it will pressurize the pressure switch to close its contacts. If this pressure switch does not close all of the time. you can take the poly type clear hose that comes from this motor if this unit has one, and blow through it several times. You will hear it click. Try starting the heater then and see what happens. The flame sensor sounds like your problem though, so clean it and get back to me and let me know.
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1 Answer

Intertherm m1m furnace board says low flame yellow lite flashes 3 times Not getting enough heat

The system most likely just needs to be cleaned thouroghly. The burners, orifices, ignition assembly and flame sensors get diry, rusty, and contaminaterd. That causes low gas flow, and improper flame pattern. The othe possiblilty is a cloged or failing gas valve.

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1 Answer

Dust inside engine and clogging sensor - 2010 Equinox

dust what kind of sensor is this, never heard of such a problem, there no sensor that should hit dust and oil, maybe your talking about a mass air flow sensor, if so that a bad call on the shop to tell you that,maf sensor does get dirty, but they must of put on a defective one, it would take at least a year or two to recollect dirt, the air is filtered with air filter. they should just tell the truth, they got a bad part,goodluck.why scare people with lies, if it the mass air flow sensor.

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Heater will not stay light

I had this same problem and the only thing that I found was a small spider web in the pilot air intake which had traped a small piece of lint I blew this out and the heater worked great

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Comfort glo propane ventless heater won't light

I have several of these heaters in my rent houses and love them. The most problem I have is not being able to ignite the pilot with the user control igniter. Remove the screws that hold the front cover in place along with the front cover. Hold the pilot control down and ignite with a lighter. Keep the pilot engaged until thermocouple is warm enough to keep pilot gas flowing. If it will light this way then you need to blow out the pilot orifice. It seems that every year I have to go in after the summer season when the heater is off and clean the pilot/orifice lines with high pressure air. I believe spiders/bugs/dust block pilot orifice when it is not in use. You can also tell that orifice is blocked when you don't get a good blue pilot flame with pressure behind it allowing the flame to submerse the thermocouple. If the the thermocouple is not getting enought heat it will turn pilot gas off for safety reasons.

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