I jumped the termostat, voltage seem to be getting through, all the blowers and fans are working, funance will ignite and run for about 3-4 minutes then turn off. The furnace will try to cycle itself 3 more time with out lighting and I get a single blink on the indecator light board.
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Re: goodman GMP075-3 Has 1 single blink on the light
The blink codes are differant on every furnace. Read your code on the schematic found on the inside of the door. You most likey have a dirty flame sensor. Under the burners you should find a "single" wire going to a connector. This will be to the far left or right. Just opposite of a "two" white wires going to the hot surface igniter. Remove the 1/4 inch screw closet to the single wire under the burner. carefully pull out the flame sensor. Clean it with a small piece of sandpaper. Re install it. This should fix your furnace. KEEP IN MIND Goodman GMP models are noted for defective heatexchangers. Pull out the blower assembly and turn it over. If small rings about the size of a dime falls out.... this furnace is unsafe and should replaced!
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The symptoms seem to be related to the main blower motor and/or it's capacitor. Turn the system off for a couple of minutes and then turn just the fan on while the thermostats heat setting is in the off position. If the lights still dim then replace the motor and capacitor. The clicking noise is the fan relay.
If the inducer is running and the hot surface ignition glows, there is no need to jump out the pressure switch. Check for voltage to the gas valve as the ignore glows. You will be looking for 24 volts AC. If you get none, check for a safety device called a roll out switch. There may be more than one and they are located either right or left (or both sides) of the burner tray. They may have a small button between the two electrical connections that you can push in to reset the switch. If you can not reset them, jump out the circuit and try the furnace. If still no voltage, you have a bad board. If you are getting voltage, make sure you have gas and the gas valve is turned. If yes, you have a blockage in gas valve (rap it on the side) or a bad valve altogether.
Maybe not! there is a limit switch that has opened not allowing power to pass and start the furnace. You will need to tale a Ohm meter and follow the wires thru any safety switch. In your case, it may be the thermo-disc near or over the burner box. Jump it out to test it. Now why is your blower not working (which could have been the reason why the thermo-disc opened)? Once you find which safety switch is open and you have jumped it out, take a jumper wire and jump between the R and G terminals on the circuit board. This should start your fan. If not, either the fan is stuck, the fan motor is bad or hopefully noy; the circuit board is bad.
One thing you can checkmis the continuity through the ignitor itself if you have continutity through that there is also some safeties it has to go through but the board is where the voltage is supplied for the ignitor. I would check the high limit and the roll out before condeming the board.
Try to locate the red and white wires either behind your thermostat or on the furnace itself. Jump them out and see if the furnace stays on. If you do it at the furnace you will need to hold the door switch down. If it runs fine, you have found your problem (the thermostat) if it goes out again, the furnace will display a number of blinks on the circuit board. Look on the reverse side of the furnace access door and there should be an Error Code chart to get you started figuring where to look next.
I Also have the same and other problems with my furnace model # GDS80703AXBB. First the LED kept blinking 4 times and I too jumped the primary limit, that didn't kelp. After several attemps I moved the wires going to the circut board and everything starting working again. After a week It stopped working again, so I pulled the plug out of the circut board checked all wires for for a bad connection plugged it back in. Now the LED blinks 6 times again I move the wires. Then the LED blinks 3 times. Then the transformer burns out. I have burned out 2 transformers and I have ordered a new circut board.
If there is no blinking light, then the unit is not seeing a call for heat or cool. My guess is a lose or broken wire in the thermostat circuit. Try and putting a jumper across the red and white heat terminals inside the furnace and manually closing the door switch. If you get heat, it's telling you there is a wiring issue. If you get nothing, it's a bad circuit board.
A constant red light (not blinking) indicates that the thermostat is not calling for heat. Of course you know it is but just to be safe, jump out R and W on the board. If it continues to do the same as you indicated, replace the board.