Question about Goodman Heaters

1 Answer

Starts and stops repeatedly

Before it even stats it will repeatedly ignite at 30 second intervals for about 12 times before starting.Then the heater will start up and after about 1 minute will turn off again It will repeat this process until the temperature level of the thermostat has been reached. After the thermostat level has been reached it will blow cold air though the ducts.

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert who has written 50 answers of more than 400 characters.


    An expert whose answer gotĀ voted for 20 times.

  • Expert
  • 189 Answers

I need more info!
Have you checked the diagnostic indicator?
Some possibilities are....
If the buner lights than rapidly goes out....You have a dirty flame sensor..... Remove the sensor with a 1/4" nutdriver. This sensor is located under the burners. It has "ONE" wire hooked to it. unplug the wire. pull ou the screw. Carefully remove the sensor. Clean it with a small piece of sandpaper. reintall. This should give you heat.

Pressure switch.....If the burner does not light. It can be a variety of problems. Check your flue pipe for obstructions.

Heat anticipator in the t/stat

Posted on Mar 08, 2009

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Kerosene Heater starts up and then shuts down

David, you need a copy of the Troubleshooting Manual here:
It sure sounds like a failure during pre-ignition. Page 5 covers both of your burn times with two different Flow charts.
A yellowish flame can mean a warped flame ring or incorrect air flow.

Dec 29, 2014 | Heaters

1 Answer

No power to gas valve after igniter glows

Typically it should glow for a full 30 seconds BEFORE power is sent to the gas valve to open. This is even after the 'pre-purge' sequence where the inducer starts and runs for a predetermined amount of time to purge the heat exchanger of any residual gas. The whole sequence can approach 3 minutes or more on some models.

Check all connections on the circuit board before assuming the board is bad.

Feb 15, 2014 | Goodman GDS80904BNA Open Flame Heater

1 Answer

When calling for heat, no flame, burner doesn't attempt to ignite, blower starts after about 30 seconds blowing cold air.

If the unit has a induced draft motor on it it then it shoul turn on first when stat is calling for heat. If it does so then in about 30-45 seconds the igniter whether hot surface or spark should try to light pilot. If this is not happening then you probably need to replace the igniter. Hope this helps. Thank you

Apr 15, 2011 | Heaters

1 Answer

Good morninng, My Goodman furnace inducer stops and starts at various intervals. At times it runs fine but starts the same issue. Everything starts up accordingly, runs and then the inducer stops for...

Replacing the board, flame sensor, and pressure switch, and cleaning out the induction motor was definitely a good start. Other things to check would be a blocked or restricted flue pipe, I have ran into a few bird nest before!, and you also want to check or replace the hose that runs from the inducer to the pressure switch if you haven't already. To be honest, most of the time I clear out the nipple on the inducer where the hose goes with a small piece of wire and it works. The last thing I would suggest is making sure the new pressure switch is rated for what you need. Alot of the revisions on furnaces actually call for less than the original pressure just for this problem. Hope this helps and good luck!

Feb 15, 2011 | Goodman GMS90703BXA Heater

1 Answer

Heater will not light. When the T-Stat calls for heat the vent fan starts and runs for 40sec, then the igniter starts (I can see it sparking in the manifold), next the gas valve clicks. All this seems...

Are you sure that your gas supply is strong enough, and that being said is there an in line regulator on your installation? You need gas pressure along with volume to burn properly. The itself sounds fine it is going thru all of its system checks then shutting down. You need someone with a set of gauges and check gas line pressure then check past the regulator and again check the pressures. It could be as simple as opening the regulator up slightly or as costly as replacing the line with a bigger one to support the heater. Make sure that you have purged the line good, and I would do this at the dirt leg in the supply or as close to the heater as possible.

Dec 27, 2010 | Mr. Heater MHU45NG

1 Answer

My central heating unit is in the attic of my 2bd/2bth house. I don't know its age. It's a gas unit, but doesn't have a constant pilot flame. Rather, the pilot is ignited electronically. The problem is...

You don't mention make or model so here is my guess as to how to thinkout the trouble of what ever is in your attic.

For some reason, your heater is mis-firing. Normally, I would expect 3 to 5 such events at which time the heater goes out on safety. The heater knows it is on safety but you don't until it gets cold in your house. When you turn the power off, wait the 30 seconds, turn it back on, the heater no longer knows it is on safety (memory cleared) so it fires. Your heater continues to fire until ? at which time it starts counting again to 3 or some number. At the max mis-fire number - it goes out on safety again ... repeat - turn it off, wait 30 seconds, turn it back on - no memory and so forth.

Do you have a service contract or regular service man? Might be time to find one.

Thanks for your question at

Jan 05, 2010 | 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

The igniter glows and the burner starts but shuts down after abou

one of two things it could be the flame sensor or the control board for the entire unit

Oct 02, 2009 | Goodman GMS90703BXA Heater

1 Answer

I have a R-150. starts runs and fames out in 30 seconds and continues to blow fuel for about 20 to 30 seconds and then I assume flame sensor shuts it down. Im thinking ignition coil. Any ideas. Thanx

What usually causes that is the ignition component is not hot enough to sustain a hot enough temperature to keep the fuel burning some have a spark ignition some have a hot surface ignition,try replacing it and it should work fine.

Sep 02, 2009 | Reddy Heater-30-55,000 BTU Variable

Not finding what you are looking for?
Heaters Logo

Related Topics:

116 people viewed this question

Ask a Question

Usually answered in minutes!

Top Goodman Heaters Experts


Level 3 Expert

1901 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