Question about Goodman GMS90703BXA Heater

1 Answer

Goodman GMP100-4

Upper Fan turns on, this is the vent fan I figure, Ignitor turns on , Gas enters and fires for about 30 seconds, the blower fan does not come on at all. then the bunner stops. I presume this is because the blower fan never turns on. it repeats this process about every 5 minutes.

Posted by on

  • 1 more comment 
  • gregwayman Feb 12, 2009

    I forgot to mention that this unit runs the central a/c also. I lowered the setting on the thermostat to 60 degress ( the house is 65 degress right now ) and turn it to cool and the blower fan doesnt start up then either. I presume maybe the blower motors is bad. Is this common? The unit is 9 years old. What should I check before I go buy a new blower motor. Thank you

  • gregwayman Feb 12, 2009

    I forgot to mention that this unit runs the central a/c also. I lowered the setting on the thermostat to 60 degress ( the house is 65 degress right now ) and turn it to cool and the blower fan doesnt start up then either. I presume maybe the blower motors is bad. Is this common? The unit is 9 years old. What should I check before I go buy a new blower motor. Thank you

  • gregwayman Feb 13, 2009

    clarkco2002 thank you so much for you help.

    I decieded to try turning the furnace on one more time to see if I would get the same results as yesterday, before I replaced the blower relay or blower motor. This time the furnace and flames stayed on about 30 seconds longer so the blower motor did turn on, but then shut right off. I then figured it was a bad or dirty flame sensor as you had sugested. I took some sand paper and cleaned the flame sensor and the furnance has been working since.



    Thanks again !!!! I helping out more neightbor fix her furnace. She is recently divorced and her and her 4 young children spent the night before in their home at 58 degress

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 360 Answers

My guess would be a flame/temperature sensor

Posted on Feb 12, 2009

  • clarkco2002 Feb 12, 2009

    locate and test the blower relay, ensure it is getting power to engage as well as power for the blower.

    let me know what you find


×

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I have a Goodman GMS9 furnace. When the furnace starts the induction fan runs for about 15 seconds, the ignitor turns on but thats as far as it goes. The burners do not light and I don't think the gas...


The igniter heats a thermocouple to turn on the gas valve. From your description, the thermocouple may have failed. The noisy stack blower probably needs to be replaced but its controller may be in need of replacement as well.

Nov 01, 2013 | Goodman GMS90703BXA Heater

1 Answer

Model #GMPN100-4 Goodman furnace. Vent fan


The sequence of events for furnace operation is -

Fan purge for 30-45 seconds. During this time, a pressure switch is actuated by the running of the purge fan, proving the control board the purge fan is running.

After purge and purge prove, the hot surface ignition and or spark begins. After a few second delay, the gas valve will open. The control board then monitors for flame prove through another sensor located near the burners. If there is no flame within 3-5 seconds, the gas valve closes. It will repeat this process, usually 3 times, before it shuts the system down, which requires a power down of the system to reset.

I have seen trash get into the hose between the purge blower and the purge switch. But you could be having other problems.

Dec 17, 2009 | Goodman Heaters

2 Answers

Have a Goodman GMT070-3B which the vent motor seems to be sticking. I took apart and cleaned the brushes and reassembled. The furnace will come on only after what seems like the vent motor comes up to...


The whole assembly must be replaced.

The sequence of operation is -

Combustion fan purges the heat exchanger. A pressure switch verifies combustion air fan is running. Usually a 30-45 second purge before the hot surface ignitor glows, or the spark ignition starts.

Gas valve opens after 10-15 seconds and main burners light. Control board monitors for flame and shuts gas valve after 2-3 seconds if main burner does not light.

If burner does not light, some boards repeat this for 3 tries, then locks out and is reset by cycling power.

Air blower comes on after another 30-45 seconds after main burner ignition.

Times may vary based on the specific controller board. A flow chart and timing sequence should be located somewhere on the unit, usually in the fan compartment.

Dec 16, 2009 | Goodman GMS90703BXA Heater

1 Answer

Goodman GMT070-3A heater. When heater is turned


look for flashing code thru blower door peep hole aftter it shuts down and let me know the amount of flashes

Dec 03, 2009 | Heaters

2 Answers

The heater is blowing cool air. The furnace blower keeps running and something ignites and then goes out immediately. any suggestions?


Clean or replace the thermo couple.

It must detect a flame a few seconds after the main gas valve opens or it shuts it down. Since you are hearing the burners fire up the ignitor is working and all the other safety circuits are working to allow the furnace to fire up.

The thermocouple is a small silver tube that protrudes into the flame of the main burners, remove it and scrub with scotchbrite pad or anything mildly abrasive. You just want to remove carbon and corrosion build up, re-install and see if it fires up.

I have two Goodman furnaces and if you are to maintain them your self you should keep on hand a thermocouple and a new ceramic ignitor. They will inevitably fail on the coldest weekend of the year and the only place to get them will be from a service company with a emergency service call ...$180.00 VS $60.00 off ebay or internet sales.

Also if your power vent fan is making ANY noise it is on its last legs and buying on in advance online will save you about $80.00 over the loca ldealers price......been there done that

Oct 24, 2009 | Goodman GMS90703BXA Heater

1 Answer

Goodman Furnace GMP050-03


you either need an ignitor...even though it gets red it may not get hot enough...just repaired one doing the samething yours is doing same model number as yours. If that is not the problem the only other thing it could be is the circuit board

Dec 08, 2008 | Goodman GDS80904BNA Open Flame Heater

1 Answer

Goodman furnace


Check the roll out switch(s) and the lock out switches. They are a small disc looking about the size of a nickle, with with 2 wires attached on them. There will be a re-set button in the middle that resembles a small peg. Push this in to re-set. As the glow coil shorted out, the fuse on the control board may have blown. On the newer furnaces find the main board and look for a car type fuse. If blown, replace. You also have the symptoms of a bad limit switch, by the clicking noise (the heat fan relay) and the blower fan running instantlly.

Jan 05, 2008 | Heaters

3 Answers

Goodman Heater Blower Not Coming ON


I am experiencing similar issues..the blower you hear is the vent blower probably..mine does the same..it vents the unburnt gas out of the vent pipe thru the roof. you should be able to run the fan manually from the thermostat to at least check and see of the blower works atl..at least it will let you know if the blower motor is ok..I have had to replace the control board once and I think it is the culprit again..mine is sooooo erratic.

Dec 10, 2007 | Goodman GMS90703BXA Heater

1 Answer

Goodman heater


OK, we will need to perform a simple test of the furnace to see exactly what is going on. Set your thermostat to 10 degrees higher than you normally do so we know that there is a call for heat. Then at the furnace, there will ba a small viewing port. Watch the blinking light and record all the patterns it blinks. After a minute or so, place your hand on the PVC vent pipe(s) to see if they are warm. If not, either the thermostat is not sending a signal to the furnace or we will need to look inside the furnace to see what is happening. But if one of the PVC pipes is getting warm, place your hand on the plenum on top of the furnace connected to the ductwork. You shoul feel the metal starting to get warm. If the blower does not turn on within two minutes, there is an issue with either the blower itself or the control board.

Getting back to if one of the vent pipe(s) don't get warm. Using a piece of duct tape or electrical tape, after removing the furnace access panel, tape the door safety switch down. The furnace will now try and cycle. A small fan attached to the vent pipe should run, then it will create suction on a pressure switch that will energize the ignitor. You will notice an orange glow thru a larger viewing port looking into the burner box. After a few seconds, the gas valve will open and the ignitor will ignite the gas. The orange glow will turn to a blue flame. Now after two minutes or less, the blower should turn on. If one of these steps don't happen, you should document it and let your technician know. As far as the blinking lights, these are diagnostic codes that will tell you where to look for the issue. On the rerverse of the access panel, there is a chart that gives a simple explanation of what the blinking represents. Again, let your technician know what you discovered. Keep in mind that the furnace will cycle or attempt to start 3 times before it will blink an error code.

Remove the tape and reassemble the access panel. Yes you will need to contact your technician but the steps you performed just saved you 30-40 minutes of diagnostic time.

Nov 24, 2007 | Goodman GMS90703BXA Heater

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

Related Topics:

408 people viewed this question

Ask a Question

Usually answered in minutes!

Top Goodman Heaters Experts

paulcarew

Level 3 Expert

1866 Answers

Dan Webster
Dan Webster

Level 3 Expert

8147 Answers

Ken Thomas

Level 2 Expert

118 Answers

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

Answer questions

Manuals & User Guides

Loading...