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Four blinks goodman furnace

Is the high limit replacement something i can do myself? Where is it?

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Yes you can and it is on the heat exchanger just inside the front panel it is about 1and1/2 by 2 inches with two wires connecting to it, it has two screws holding it in place, it looks like it is a peice of flat plastic

Posted on Dec 21, 2008

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My furnace blower kicks on and the flame lights for about 5 seconds then kicks off. I replaced the igniter recently. The service trouble light blinks continuously.


Your furnace may be kicking out on high limit. Its possible your circ. or blower fan needs to be cleaned. If you don't get enough air moving across you heat exchanger it will kick off on high limit.

Jan 14, 2011 | Goodman GMS90703BXA Heater

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1993 goodman status light 4 times blinking


Witch blower is running, the inducer or the systems blower?
System blower could mean the the high limit is opening and shutting down the systems gas train, I would check this out first.

The other problem could be with the pressure switch for the gas train, it is supplied from the inducer motor, check to see if it is operating fully.

HSI boards do go from time to time, this sounds more like a system control problem.

Jan 24, 2008 | Goodman GMS90703BXA Heater

1 Answer

PGB030075-1 Led light is blinking 4 quick blinks. blows out cold air. What does this mean?


4 blinks indicates a failure at the high limit switch. This switch is usually located on the heat exchanger face plate and has two wires going to it. Usually it fails because the furnace has over heated. The most common reasons are a plugged filter or coil that is limiting the airflow over the heat exchanger. Turn off the power to the furnace, replace the filter, clean any coils in the plenum and verify that all the vents in the home are open. Then turn the power back on and see if it is fixed. :)
If the above solution does not fix the problem, the limit switch itself may be bad from excessive heat. Replace it with a new one. Good Luck!

Dec 28, 2010 | Goodman GMS90703BXA Heater

1 Answer

My Goodman GMP 125-4 furnace has 4 blinking lights and we currently are unable to get it to come on. What might be wrong?


if this is an error code and you mean that the light blinks 4 times then it is the limit circuit. This could mean either the high limit or a roll out switch is open. the limit switch is right in the center of the furnace above the burner and roll out switches are probably somewhere around the opening of the burner. Follow the wires from the limit to find a roll out switch cause they are in line with each other and the rool out switch could have a button to reset it. However if the roll out is not tripped then you could need to change the limit. Only way to know is to check for continuity.

Dec 04, 2010 | Goodman GDS80904BNA Open Flame Heater

3 Answers

Furnace main fan comes on but the furnace doesn't come on. The indicator red light blinks four times. What does this signify?


You have to get in to the main circuit board. At the bottom of the circuit board it will tell you what the flashes mean, in very small print. Read this print for you codes.

Dec 25, 2009 | Goodman GMS90703BXA Heater

1 Answer

Goodman GDS80904BNA LED Blinks 3 Times


had similar problems with same furnace. I think the 3 blinks is high limit event. either way with the power off to the furnace remove the board from the 4 clips holding it on one at a time then turn it over and look at it you will be able to tell if the board is bad because it will appear scortched and the resin will be bubbled up where it went bad. replace board and you will be fine. went through 2 in 2 years all of a sudden they are being made by a different company from the original and the 1st replacement. now all is fine. Take a good picture of the board close up so you can reconnect all the wires properly. Friend of mine got it from a wholesaler for $55.00

Dec 12, 2009 | Goodman GMS90703BXA Heater

1 Answer

Goodman Model GMNT100-4 Auto Power Down and Up until Temp.


Keep in mind all furnaces and circuit boards are not the same. Look on the back of the door to the blower compartment. You should find the list of diagnostic codes. Look up four blinks it should narrow down the problem. Although from the discription you gave it sounds lie the high limit control. When a high limit appears to be acting up it DOES NOT mean that the high limit needs replaced. The high limit just may be doing its job. This means that the furnace is overheating. Check your filters. Are all of your registers open? Is your blower set on the right speed? Is your blower going bad? Is the blower motor capacitor bad? Is your evaporator coil restricted? Just changing a high limit switch does not always solve the original problem!
Good luck....

Apr 01, 2009 | Goodman Heaters

1 Answer

Goodman furnace went out. Light blinks four times


Your main limit switch is activated. Maybe for good reason. This switch keeps the furnace from overheating. I have the same problem right now and I think my a/c coil may be blocked, limiting air flow through the heat exchanger and the furnace. Does your gas and main circulating fan come on for a few minutes before the switch activates and the light begins blinking?

Check your furnace filter and any return air ducts in your home - see if they are blocked or restricted.

Jan 14, 2009 | Goodman GMS90703BXA Heater

1 Answer

Goodman furnace blinks four times


If the main limit switch is bad, the part is cheap and you can replace it. If the main limit switch is not bad and is activating for a reason, you probably need a professional.

Jan 14, 2009 | Goodman GMS90703BXA Heater

3 Answers

Goodman furnace 4 blinks


Ohm out the safety switches also known as the high limits usually at least two on units they look like little buttons, with two wires going to each one. An open high limit will mean the circuit is not closed and allowing for the system to complete the circuitry to fire the heat, best way to diagnose is to jump out the suspected high limit s/w if the unit runs then you have your answer, but never, never leave the high limit switch jumped w/o the switch.

Dec 21, 2008 | Goodman GMS90703BXA Heater

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