Question about Goodman GMS90703BXA Heater

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Goodman Gmp150-5 The fuse still pops even after i remove the wiring for the stat. The only time it wont pop is if the red wire is off the transformer. People tell me that the board its gone and that a new one is around 200. HELP is there any way to test the board

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Sorry if you disconnect all the low volt wires from the board and it still blows fuses, th board is gone.

Posted on Nov 03, 2008

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I hooked up a coleman electric furnace to a janitrol condenser heat pump . The t-stat wires on electric furnace are red white green and yellow. I added a blue for common off of transformer for digital...

Hi, first of all you need to get a hand full of 5 amp auto type fuses and install one on the hot leg of the 24 volt secondary side of the transformer. Just use 2 female crimp on connectors and put the fuse in the middle of the hot wire. Saves $$$$ on replacing transformers when you have a dead short on the low or high voltage side of any transformer, just a trick of the trade, food for thought. Fuses are much cheaper. On your electric unit, you may not need the common on this to operate the digital stat if it has batteries. This may be your dead short. On the Janitrol condenser, the red is your 24v as you no. They are using blue in place of yellow for cooling. Red is hot, W is heat, G for fan, and blue is cooling on this Janitrol. Keep in mind you are connecting to a heat-pump also, so make sure the wiring is correct. Are you installing this for secondary Heat?? More then likely, the blue common you have added is the dead short as the janitrol uses the blue for a cooling relay in place of yellow. Anyway, use the 5 amp fuse, trick of the trade to save on the transformers. Please keep me posted, as I know know you have this under control.
A/C, Heating, & Refrigeration Contractor. Good Luck!

Feb 09, 2011 | Coleman Heating & Cooling

1 Answer

The #3 fuse in my goodman blew, adn know the unit will not turn back on, after replacing teh fuse

Check the fuse again the only thing that could make the unit blow a fuse is a short between the hot and common wires on the low voltage side there is only 2 places a common wire could be the outdoor unit and a digital t-stat maybe the 2 wire at the outdoor unit has been chewed by an animal or there touching each other somehow unwire them at the furnace and see if that fixes it (if so pull new wire) or if it's at the t-stat try unwiring the common at the furnace it will be a C terminal or a blue wire (with a wire nut connection) . The only reason a common is needed at the t-stat would be for the display most T-stats also use batteries for this application and don't even need the common wire up.try this and let me know what you get.

Nov 25, 2010 | Goodman GMS90703BXA Heater

1 Answer

My Goodman AC wont start I check the thermostat , transformer they check good the fan does not run in the on position, I saw no relay is all this controled by th board.

Remove ther thermostat wires at control board, put a jumper wire across R and G, if fan comes on after you install blower door cover and restore power, the problem is either the thermostat or the wiring.

If you dont have 24 v between r and c then either the
transformer is bad or there is a little 3amp car fuse in the circuit board that could be blown.

Jun 10, 2010 | Goodman GMS80453ANA Open Flame Mid-Size...

1 Answer

Gooman heater connected to electronic lux 500 thermostat. no response from heater at all. tried changing batteries in thermostat.could thermostat possibly be bad. had both for approx.11 years

Remove t-stat and remove red and white wires and connect them, if unit starts then it was the t-stat.
If not go to furnace and remove same two wires at furnace and jump out at circuit board or connect wires FROM furnace, if it starts the problem is in wires.
If you have power to furnace?? and nothing happens it is either a bad board or inducer motor (little one) is not starting. Remember that their is a fuse on corcuit boards that need to be checked.

Feb 04, 2010 | Goodman GMS80903BNA Heater

2 Answers

5 amp fuse continues to blow on control board for both AC and heat. External compressor unit with air handler and gas furnace in attic.

You have a short on the 24 volt side of the unit. Check the thermostat wire for signs of pinching or direct short.

Oct 17, 2009 | Goodman GMS90703BXA Heater

1 Answer

Touch pad control not working

Put fan switch to "on" position..
Does it come on?
If yes , you still have the 24 volt control circuit ,thus the high voltage as well!
If not you may have a bad transformer or stat
Remove stat
jumper red wire to green wire
Does fan run?
If yes , bad stat
if no
possible time delay fuse or breaker at air handler disconnect or bad transformer

Aug 23, 2009 | Heating & Cooling

1 Answer

Goodman furnace

double check your wiring. R terminal on the furnace will provide 24 volts to the t-stat. W terminal in the t-stat will send 24 volts back to the furnace W terminal to turn on the heat. G terminal in the t-stat will send power to the G terminal in the furnace when the t-stat is switched to fan on. Y terminal in the t-stat will send power to the Y terminal in the furnace which in turn will send 24 volts to the A/C outside. The C terminal in the furnace should be connected to the c terminal in the A/C outside as well as to the T-stat. Check the fuse again

Jun 02, 2009 | Goodman GMS90703BXA Heater

2 Answers

LED light blinking constantly

short in a/c wires on contactor is bad, disconnect wires at a/c and power up if no pop fuse it is the contactor. if still pops replace wire.

Apr 24, 2009 | Goodman GDS80703ANA Open Flame Mid-Size...

1 Answer


you have a low voltage issue, check for any bare wires at stat or unit, have you done any home repairs " such as hang pictures and so on" sometimes homeowners nick the 24v lines which can cause that porblem.

Oct 26, 2008 | Goodman GMS90703BXA Heater

2 Answers


On the Goodman control panel each wire is marked (on the PCB board) Y, R, B, W, Br etc. These should also be letters next to the screws for the wires on the thermostat. match the letters/colors to both sides.

Nov 08, 2007 | Goodman GMS90703BXA Heater

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