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Goodman GMP125 - 5

On a call for cooling the condenser starts and then the indoor fan comes on after a few seconds the indoor fan shuts off and then comes back on again and it keeps repating this. The control board red indicator light does blink 4 times when the fan goes off indicating there is a limit open. I only see a limit switch on the R leg coming from the transformer. I don't see anything else that would make the fan go on/off continuously. Any suggestions?

Posted by diarch on


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It could be a broken wire or bad control board.A popped roll out switch could cause this also

Posted on Aug 06, 2008


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2 Answers

I am trying wo wire the t-stat on a package heatpump. the wiring inside the unit does not have a yellow wire but does have a purple wire. What does it hook to and why no yellow wire?

With a heat pump the indoor fan coil does not have a yellow wire that is true your yellow wiring comes from the thermostat which is a 6 wire or 8 which is also true coming from the outdoor condenser you must connect the yellow coming from the condenser and the yellow coming from the thermostat inside the fan coil cabinet the purple is for heating

Oct 11, 2018 | Goodman Heating & Cooling

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Condencer runs for 20 sec then off keeps repeting after 2 or 3 min goodman central system

Seems like it trying to start and then cuts out , possibly on overload. Try the machine on fan blow only , that will check the indoor unit to see if that is working. Then try cool or heat function while listening to the machine starting. If you hear a loud humming just as the fan starts, and then it cuts out, It could be a compressor issue. Possibly the start capacitor has failed.

May 27, 2015 | Goodman Heating & Cooling

2 Answers

Goodman heatpump fan runs, condenser wont start

Either the condenser fan has bad bearings, or it has a defective fan capacitor.
Turn off the breaker to the outside unit.
Spin the fan blade by hand.
If the fan blade spins easily and will spin a few revolutions with no problem the fan bearings are good.
If not, replace the fan motor due to bad bearings.
I am pretty sure you fan motor is bad because with a bad capacitor the fan motor will not get up to speed and may just sit and overheat.
I'm leaning toward a bad fan motor.

Sep 27, 2012 | Goodman Manufacturing Goodman GSC130301...

1 Answer


! shut it down but leave the indoor fan on. check the filters and replace as needed. It also appears the drain is plugged or iced up. If ou can access the indoor coil you can service the drain and run some hot water thru the pan that catches the condensate. If you can see your indoor coil and you see a "lint blanket" on the indoor coil you will have to vacume it off as well. I hope this helps let me know Jon

Aug 05, 2011 | Goodman CLQ36AR49 Air Conditioner

3 Answers

Fan on outdoor a/c unit not running

call in the technicians
compressor shutting down or power to the fan being interrupted causing the compressor to shut down

Jan 23, 2018 | Goodman CKL36AR36 Air Conditioner

1 Answer

The ac comes on but the fan is not turning or comes on

Hi, I assume this is a split system, with the indoor and outdoor unit. If you are talking about the fan on the outdoor unit, this is the condenser fan motor. It is exposed to the heat of the ambient temp. and removing the heat from indoors. If you have a heat pump, this motor runs year around and gets a lot of use. I have seen the 5mfd run capacitor fail which could cause this motor not to start, but more than likely the condenser fan motor has burned out.If it is the outdoor unit you are talking about, can you hear the compressor come on when you start it? You may stand by the unit and have someone turn the t-stat to cool and see if you hear it come on. It will shut off after awhile due to high head pressure. But, if nothing happens, you may not be getting power from the breaker being tripped or a blown fuse at the disconnect box at the unit.Check these before calling out a tech.If you are talking about the indoor fan, make sure the panels are on good if its a gas unit as there is a door switch that is closed and if the panel is loose, it will stop the fan from coming on. The indoor blower motor may also be burned out. It shouldn't take more then an hour at the most to find out what is causing this problem. Could be a fan relay. I would recommend calling a qualified a/c Co. to come out and check this. Wish I was there and could be of more help.
Good Luck, Sincerely, Shastalaker7

Oct 31, 2009 | Goodman CLQ36AR49 Air Conditioner

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Compressor tries to turn on but takes a while

weak comperessor you need to test it first...or you may have something that jaming the fan

Sep 11, 2009 | Goodman CLQ36AR49 Air Conditioner

1 Answer

Compressor runs 45 seconds off for 2 minutes cycles like this no voltage change

In order to accurately determine and diagnose the problem, a more detailed description of the problem needs to be communicated as opposed to normal operation of the system so a repair person can determine that there is in fact a problem. There's a big difference between solving a problem via text as opposed to seeing what is wrong in the field. They rarely are the same.

Goodman condenser sequence of operation on a matched system. Call for cool, condenser starts, 15-30 seconds later blower motor starts, cool satisfied, condenser shuts down, 15-45 seconds later blower motor shuts down. House heats ups and a call for cool via the thermostat starts another cycle.

Based on normal operation it is impossible to determine whats wrong with the information given. There are perhaps 5 voltage measurements in the system that you could be referring to.

Aug 19, 2009 | Goodman Heating & Cooling

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