Question about Goodman GDS80904BNA Open Flame Heater

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Gsm080-4 4 blinks on code cover says main limit open or aux limit

Can i check them or not?where are they located. iits been runntssat morning and temp is -12degrees out. iwaited for gas valve to kick on then lite the burners manualy its been running about 4hours now . istopped it now but same thing

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Sounds like you have a hot surface ignitor that is not working. The ignitor is located in front of the burner assembly. It usually takes two 1/4 screws to hold bracket. If you need and more help just reply back to this solution with your questions and i will try to help you

Posted on Jan 17, 2009

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Have a gmp125-4 furance blower runs all the time checked themostat wires error code 1 blink then 2 then 3 then 5 furance works if you turn power off turn back on when heat kickes off blower comes on gives...


Sounds like limit switch issue. Furnace heats up, high temp limit switch opens, fan will stay on. GMP model is older and do not have the codes.
May be over fired, have airflow problem, to cause the limit to open.
Next time before shutting off power, try to find the limit, it has two wires that connect to a 1.5 x 2 inch card mount to the furnace fire wall. tap on it and see if the blower stops. If so replace the limit.

Sep 06, 2011 | Goodman Heaters

1 Answer

Furnace problems


On - OK
1 Blink - Ignition failure. Check Gas flow, gas pressure, gas valve, flame sensor.
2 Blinks - Closed pressure switch. Check pressure switch (stuck in closed position).
3 Blinks - Pressure switch - failre to close. Check venter, pressure switch, vent blockage.
4 Blinks - Open limit switch. Main limit or aux limit are open. (My comment - Means overheating in chamber. Often result of blocked intake air. Bad filter. In my case, plastic wrap had been sucked into the intake. )
6 Blinks - False flame sensed. Check sticking gas valve.
Rapid continuous blinking - Incorrect twinning, incorrect primary polarity. Reverse transformer secondary leads, reverse primary wires.

Closed pressure switch can be from dirty combustion vents, bad chamber pressure - like missing screws, maladjusted gas pressure, failing pressure switch, loose hoses, moisture in the hoses or fan blades The switch need to be closed to ge the unit to work

Jan 23, 2008 | Goodman GMS90703BXA Heater

1 Answer

Where is the high limit switch. led is flashing 4 times telling me to open the high limit switch.


There may be a couple of them. One is located over the burner and will have two wires going to it. It is usually located inside the furnace box and covered with a plate with two screws. The wiring diagram will give you the color of the wires to help locate. The other may be located on the burner and looks like a small stack of quarters with two tabs at the 9 and 3 positions. It will also have two wires going to it and may have a small reset located between the two wires. Push in on the dark red tab to reset. Check your air filter, it is the main cause for high limit to fail.

Jan 23, 2011 | Fedders F80A0703 Heater

1 Answer

The red light on the motherboard blinks four times after it cycles is that right?


Change the filter and any aux or a/c coils in the plenum. This problem is associated with over heating because of lack of air flow. You can also check resistance on the limit. If it is open while it is cool, it is bad.

Nov 28, 2010 | Goodman GMS90703BXA Heater

1 Answer

Bryant Plus 90 Furnace - Blower works fine and intermittently blows warm air but will not bring house to temp set on thermostat... Get a 1-3 error (one blink and then 3 quick blinks of the LED) Thanks


PRSSURE, DRAFT SAFGUARD, AUX-LIMIT SWITCH(WHEN USED)OR BLOCKED VENT
SWITCH(WHEN USED) DID NOT CLOSE OR REOPENED (DOWNFLOWONLY)
If open longer than five minutes, inducer shuts off for 15 minutes
before retry.
Check for:
* proper vent sizing
* defective inducer motor
* restricted vent
* excessive wind
* low inducer voltage(115VAC)
* defective blower motor or capacitor
* defective pressure switch
* inadequate combusstion air supply
* disconnected or obstructed pressure tubing
If it opens after trial for ignition period, blower will come on for
90 sec. recycle delay.
Check your air filter for blockage, check pressure switch for a buildup of moisture. Make sure your inducer motor is turning and creating a vacuum to the pressure switch. Make sure all venting is clear and free of water or debris. Make sure there is no water in inducer motor and all drains are draining.

Jan 28, 2010 | Heaters

1 Answer

4 blinks, main limit switch open or aux limit switch open. How do I fix this?


There is a limit switch above the burner with 2 wires going to it. Take a jump wire and jump out the switch to test it, It is 110 volts so be careful. If it fires, that switch is bad and will need to be replaced. There may be up to two more switches on the same circuit. These switches may be reset-able if there is a small dark red button between the two terminals. Why did the unit overheat in the first place. Is your air filter clean? Is the room air blower working? Are all return air grills free of obstructions?

Jan 24, 2010 | Goodman Heaters

1 Answer

Open limit switch


Tjere is a limit switch that will only allow the durnace to reach a certain temp by kicking on the fan. The thermostat being unable to read the temp affects its ability to keep the furnace from exceeding your settings. *Advise not to use until corrected. Both limit switch and thermostats are inexpensive and simple to change. If in doubt, call a heat and AC tech to repair.

May 18, 2009 | Coleman Propane Forced Air 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

Limit Switch


It is rare that a limit switch goes bad. It is a safety control. If it is shutting off your furnace there is a problem that it is protecting you from.
If the limit switch is shutting the unit down your furnace is overheating. Check the filters. Check for any obstruction in the blower assembly. Check to see if you can raise the blower speed. Make sure all registers are open in the house. Your evaporator coil could be obstructed if you do not take good care of your filters.

Feb 28, 2009 | Goodman GMS90703BXA Heater

1 Answer

I have a Goodman furnace GMPN080-4 REV B. I had the blower motor take a dive, so I replaced it with another equivalent 115 VAC 60 Hz 1/2 HP motor. I replaced the 10.0 MFD +10% -5% capacitor with a 7.5 MFD...


limit switch is on the heat exchanger black plastic about 1and1/2 in. by 2 in. with 2 wires going to it , it has 2 screws holding it in take it out and check it with an ohm meter and you should not have a reading if it is good

Feb 01, 2009 | Goodman GMS90703BXA Heater

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