Question about Goodman GMS90703BXA Heater

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Goodman furnise 3 flashes on new board no 24vac at preasure switch why

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  • Goodman Master
  • 1,033 Answers

Is the inducer motor running?

Posted on Jan 15, 2013

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Posted on Jan 02, 2017

gear001
  • 59 Answers

SOURCE: I have a Goodman GMP075-3. Worked OK on A/C.

I come across this one a lot. You need to switch the wires at power cord.

  1. Pull power out
  2. follow the cord* back to the furnace
  3. Open the front door
  4. There should be a small metal box where the cord leads to inside the furnace
  5. Open that up
  6. Take the electrical tape off
  7. Pay attention to which wire goes where
  8. Switch the two wires around
If you still got problems ill walk you through it over the phone www.fastacservice.com

Posted on Oct 12, 2009

  • 9 Answers

SOURCE: Goodman GMPN060-3 Furnace will not stay lit.has

possible faulty gas valve if all fail safes stay closed. make sure flue is clear for pressure switch to stay closed.

Posted on Dec 16, 2009

heatman101
  • 43501 Answers

SOURCE: my goodman GMS90703BXA gave an error message (3

Hi,

Here is a tip that will help you try to figure out why your furnace is notworking.

Basic Furnace or Heating System Troubleshooting

heatman101

Posted on Jan 06, 2011

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Goodman GSC130421ab has no voltage to contact after washing coils....it worked just before powering off unit at diconnect to clean the condenser coils


very posisble.check the fuse on the board on the indor unit. replace with equal size fuse (not bigger probably 3 amp). if the indoor unit comes on then the fuse is fine and i would suspect the coil on the contactor has shorted

Oct 02, 2012 | Goodman CKL36AR36 Air Conditioner

1 Answer

I have a Goodman heat pump and the condenser fan and compressor will not switch on. The board green light says improperly grounded or flame sensor not sensing flame (both are incorrect). The AUX heat (gas)...


Does the indoor fan run? Place the fan switch in run. If it doesn't run then the transformer could be bad. Also, there could possibly be some high and low pressure switches that would keep you from getting the 24vac to the contactor. First rule out the thermostat by removing the face and installing a jumper wire between the R and Y terminals. This should make the outside unit run. If it does then your thermostat is not passing 24vac to the unit and should be replaced. If it doesn't run with the jumper in, then your problem is in the outside unit. Trace out the yellow wire from the thermostat in the outside unit and check the components that the wire goes through (high and low pressure switches). Let me know what you find so I can offer more help if needed.

Sep 15, 2010 | Goodman Heating & Cooling

1 Answer

I have a Goodman GMP075-3. Worked OK on A/C.


I come across this one a lot. You need to switch the wires at power cord.
  1. Pull power out
  2. follow the cord* back to the furnace
  3. Open the front door
  4. There should be a small metal box where the cord leads to inside the furnace
  5. Open that up
  6. Take the electrical tape off
  7. Pay attention to which wire goes where
  8. Switch the two wires around
If you still got problems ill walk you through it over the phone www.fastacservice.com

Oct 12, 2009 | Goodman Heating & Cooling

1 Answer

Goodman forced air gas furnace not firing


if your power vent moter is not running you should not have have glowing ignitor.Frist the vent moter must close an air prove switch in series with the idnitor .seems you have a stuck air prove switch.Its the one with a hose attached

Apr 04, 2009 | Heating & Cooling

2 Answers

Goodman a/c blower fan will not shut off


Unhook the thermostat wires on the furnace. If the blower shuts off then your problem is either the thermostat or the thermostat wires. If it contiues to run check you high limit switches next. If all else fails you most likely have a bad blower relay. On most modern furnaces the blower relay is part of the circuit board.
Good luck

Mar 29, 2009 | Goodman CLQ36AR49 Air Conditioner

1 Answer

Gmp075-3 Indicator still flashing 1 after circuit board replaced


Replace the gas valve. If you getting 24vac at the gas valve and it fails to open. Firist check all wiring connectors.

Feb 01, 2009 | Heating & Cooling

5 Answers

Goodman furnace I think


Ok, a flashing 3 on a Goodman control board usually means that the pressure switch is tripping. A few things will cause this. One being a restriction in the exhaust or combustion air inlet. The second could indicate a faulty inducer blower motor and the third would be a blocked or bad pressure switch.
 
With the front cover off and door switch taped down, Have a helper turn the thermostat up to 75. You will be watching the circuit board for flashing lights and in a few seconds the inducer motor (the small fan hooked to the exhaust) will start. If this does not happen, we either have a bad circuit board or blower motor. If the fan starts rotating, inspect the hoses going to the small circular pressure switch. Sometimes they may get either water or debris in the hose and not allow the switch to sense pressure. If the hoses look OK, the igniter will glow an orange color and you will see this if you look thru the small viewing port. IF no glow, you could have a bad pressure switch, a bad ignition relay (found on the circuit board) or a bad igniter. OK so if the igniter glows, a few seconds later the gas valve should click open and send gas to the burners. The orange will turn to blue. If this does not happen, you have either a bad gas valve or bad circuit board. Finally if you get flame but it will not stay lit more than a few seconds, you may have a restriction in the burner gas train, a bad gas valve, a dirty or bad flame sensor or not enough gas pressure.
 
Knowing the sequence of operation will give you the needed information to talk with a service technician and cut down on diagnostic costs.
 
Try looking on the back of the furnace access panel for both model number and a diagnostic schematic. This will confirm what the flashing 3 code means for your unit.
 
Sorry, without knowing the model number, this is the best I can do for you. Good Luck!

Oct 28, 2007 | Goodman GMS90703BXA Heater

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