My goodman furnace has been working properly for over five years, now having a problem with the furnace shutting off and giving a code of six flash on led, checked intake and outlet line, open, used compressor to check, replaced throw out limit switch, drain is open and trap working, cleaned flame sensor, nothing will keep it running for more than ten minutes, switch will activate and shut furnace down. blew out fan, cleaned all lines, checked all electrical connections, where do i go from here?

Voltage polarity switch.

When the light is blinking six times rapidly, this means the power volt polarity has gotten switched.

How to Troubleshoot a Goodman Furnace With Six Flashes

Videos as well

https://www.google.com/search?q=goodman+furnace+red+light+blinking+6+times

..

if flame sensor is new, the board may not be properly recieving currrent from flame sensor to keep burners on

decouple the output of the pcb ,put a 10-100nf between the two connectors

https://www.repairclinic.com/RepairHelp/How-To-Fix-A-Furnace/171-377-1442688-/Goodman-Furnace-not-heating-GDS80703AXBC
Check out this site. Has DIY videos that cover your issue.

A sampling of various failure codes on a furnace:

Read one LED flash that stays on continuously to mean your furnace has no signal coming from the thermostat and will not operate. Turn the power off and check the thermostat for improper settings or connections.

Interpret one LED flash that blinks on and off to mean your furnace has locked out because it could not ignite after three tries, and must be reset. Interrupt power to your furnace for 20 seconds or lower the thermostat so your furnace does not try to heat, then reset the thermostat to the previous setting. After one hour of lockout, your furnace will automatically reset itself and try to operate as usual.

Decipher two LED flashes to mean the draft blower is not working, or your furnace has a short in the pressure switch circuit. Turn off the furnace power and repair a short or replace the pressure switch.


Read three LED flashes to mean your furnace has an open pressure switch circuit or it has an induced draft blower operating. Check the pressure switch hose of your furnace for blocks or an improper connection. Also, look for blockages in the flue, and tighten any loose wiring.

Translate four LED flashes to mean your furnace has a primary limit circuit open, possibly from loose wiring or blocked filters. Check and clean filters, tighten wiring and check the flue for blockages.

Interpret five LED flashes to mean your furnace senses a flame without a call for heat. This could be from a gas valve closing slowly or a burner flame lingering.



Read seven LED flashes as a warning of a low flame sense microamp signal. This could happen with a coated flame sensor or a lazy flame from poor gas pressure. Turn off the power and adjust the gas pressure according to the information on the rating plate.



See eight LED flashes as meaning an igniter circuit problem due to a bad igniter or an igniter connected improperly. Replace the bad igniter or check the ground wiring, making necessary corrections.



Decipher nine LED flashes to mean the high-stage pressure switch circuit will not close during a high-stage-induced draft blower operation. Your furnace may have a pinched or blocked pressure switch hose, a blocked flue or loose wiring.

Read continuous flashing on the LED to mean your furnace has a reversed polarity of 115 volts. Turn off the power and correct the wiring polarity after reviewing the wiring diagram.


If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

Look on the wiring diagram for an error code chart. It will give you a starting piont.

The light is supposed to be on, if there is a fault in the furnace the light will begin to give u a flash pattern... ie; three flashes...or two flashes.. on the furnace exterior or on one of the doors there should be a fault code chart.... read the chart on the unit it will tell you what light is on and when..

The first thing to look at is the flame sense rod.
Shut off power to the furnace, remove, clean sensor with steel wool or sandpaper then reinstall the sensor. Reapply power and it should run properly.

Not having a model number to help you with, I can only give you generic info. Typically a flashing 1 represents that the furnace has exceeded its allowed attempts to start. Not much help. If I can suggest removing the access panel on the furnace and tape down the door safety switch. That being done, have a helper turn up the thermostat and you get your head inside the furnace cabinet and document what it does. It should first blink on the LED indicating a call for heat. Next the inducer blower should start up (the small blower hooked to the exhaust pipe). Next you may see an orange glow where the burner is. There should be a small clear port where you can watch this. Next some clicking should be heard from the gas valve. Then the orange glow should turn to a blue flame. This flame should travel all the way right and left igniting all the burners. Then it should stay on until the call for heat is satisfied.

After doing this and with your model number, get back to us and we may be able to pin-point your issue.

AA, it could be a lot of things going on or just one little thing. I have atached a link that you can open to get your owners manual for that furnace. Inside there is a diognostic troubleshooting guide that may help.

http://www.dnmech.com/lit/io-244c.pdf

Good luck and let me know what you discovered.