Question about Goodman GMS90703BXA Heater

1 Answer

GMPN120-5 Furnace First of, old thermostat is installed. It was blinking and I replaced the battery. The reason I found out was it kept turning on/off. Second, thermostat is working and the fan comes on but not the heater. It goes thru a cycle. I adjust the temp. -> it clicks and heater starts but the burners won't come on. It works for about 20 sec. and then stops. Fan works but no heat.

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert that hasĀ over 500 points.


    An expert who has written 50 answers of more than 400 characters.

  • Expert
  • 277 Answers

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

York diamond 90

The problem could be clogged hoses or hose connections or a bad pressure switch. Remove one wire from pressure switch start furnace as soon as inducer fan starts reattach wire if furnace runs replace pressure switch.hope this helps

Dec 11, 2013 | Heaters

1 Answer

Honeywell programmable thermostat - was installed per instructions in manual and now the furnace runs non-stop unless I move switch to "off." The old (round mercury switch) thermostat was wired red t

If you are unsure about which wire goes where, that may be the source of your problem. The color coding can be confusing when changing from old to new. I pulled the instructions for my Honeywell CT3400A thermostat and found you can call Honeywell Consumer Services at 1-800-468-1502 M-F 7:30 am to 5 pm CT

Mar 11, 2013 | Heaters

1 Answer

Thermostat not turning on furnace.

Hi, You need to go to the furnace to see if you have lost the 24 volt supply, the transformer. If you have a circuit board, see if it has a 3 to 5 amp fuse plugged into it that is blown. This will kill power to stat causing nothing to work. Let me no what you find and we can go from there.

Dec 29, 2009 | Heaters

1 Answer

On occasion, my furnace will not kick on at

If your Rheem furnace is less than 10 years old, it may store an error code to help you figure out if it is the furnace or the thermostat. Look at the circuit board for a blinking light. If you have to remove the panel that opens up the door safety switch, it will erase the code. Look for a small viewing port. Next time the furnace fails, prior to doing all the things you did last time, look thru the viewing port to count the number of blinks. Once you get the number, open the cabinet and on the wiring diagram glued to the back of one of the panels'\; there will also be an error code chart. It may give you a starting point where to look. If you have no error code, chances are that your thermostat is freaking out or has a bad connection. Hope this helps.

Dec 28, 2009 | Honeywell CT3200 5-2 Day Electronic...

1 Answer

My 23 year old Rheem furnace stopped working not long after installing a programmable thermostat. Is the thermostat the problem or the unit is just too old?

If you did not turn off the power to the furnace when you installed the new thermostat. There is a very good chance that you shorted the thermostat wires and burned up the transformer in the furnace. Or, if you're lucky, you may have just blown the control voltage fuse if there is one installed.

Oct 29, 2009 | Heaters

1 Answer

I replaced my old mercury thermostat with a ct87k and it will not turn on. I have tried several so they surely are not defective. Hooked my old one back up and the furnace works. only 2 wire supply on a...

the two wires are hooked to the baseplate at the R terminal and the W terminal. there may be a switch somewhere on thermostat for electric or gas heat. make sure its in gas mode. make sure batteries are fresh and put in correctly in regards to polarity. make sure furnace is on when doing any settings with the thermostat. make sure themostat is set to "heat". make sure themostat is calling for heat (turn way up to be sure its doing that) . check the troubleshooting guide that came with the new thermostat.

Oct 27, 2009 | Honeywell CT87B ROUND HEATING&COOLING...

2 Answers

Furnace blower not working how it should

first off buy yourself a honeywell stat, in my personal opinion lux stats are garbage, I have run into so many that are bad stats !!! but as far as your fan not shuting down, sounds to me like your fan center on your circuit board is bad and will not shut down the fan when needed, you will have to replace the circuit board, as the fan center is a part of the whole of the circuit board, hope that helps

Jan 19, 2009 | Coleman Propane Forced Air Heater...

1 Answer

Furnace not cycling properly

sounds like the flame sensor needs to be replace. You can try cleaning it with steel wool. This will get you by for a little while.

Jan 17, 2009 | Honeywell Electronic Programmable...

1 Answer

Fan on but no heat

I never liked the user un-friendliness of the Chromatherm, I would suggest finding a thermostat that you can understand and operate. Yes the Chromatherm is a good one, but so damned hard to figure out. Stay away from thermostats that still use mercury. Good Luck!

Oct 20, 2008 | Honeywell Heaters

4 Answers

Goodman code problem three blinks

Same problem with 1 yr old Goodman. Checked entire exhaust and pressure switch. Inside fan, pressure switch hose clogged with crusty white gunk. Cleaned it & furnace fixed. I have no furnace repair experience, but love to "play MacGyver". Hopefully this could save someone a service call.

Sep 18, 2007 | Goodman GMS90703BXA Heater

Not finding what you are looking for?
Goodman GMS90703BXA Heater Logo

223 people viewed this question

Ask a Question

Usually answered in minutes!

Top Goodman Heaters Experts


Level 3 Expert

1875 Answers

Dan Webster
Dan Webster

Level 3 Expert

8147 Answers

Ken Thomas

Level 2 Expert

118 Answers

Are you a Goodman Heater Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides