Question about Goodman GMS90703BXA Heater

3 Answers

Goodman furnace 4 blinks

I have a goodman furnace, and the diagnostic light is blinking 4 times. I removed the access panel and the chart indicates '' open high limit''. What does this mean, and is it something i can fix? I bought the furnace through a ''buddy'' and he installed as a ''side job''. It is a high effiency furnace and is only two years old. I can't tell you the amount of times I have had to call my ''buddy'' to have him come look at it. Anyways, the furnace is out, the kids are cold, it is 5 degrees here, with -25 wind chill, and my ''buddy'' is not answering any of his phones. Any help would be greatly appreciated.

model# gcs90703bxaa

Posted by on

  • 1 more comment 
  • coldwife Dec 22, 2008

    Mine to.

  • Anonymous Mar 26, 2009

    same

  • Stephen Evans May 11, 2010

    what is the Model # so i can look in the proper manual. Yes this might be something you can fix

×

3 Answers

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 13 Answers

Ohm out the safety switches also known as the high limits usually at least two on units they look like little buttons, with two wires going to each one. An open high limit will mean the circuit is not closed and allowing for the system to complete the circuitry to fire the heat, best way to diagnose is to jump out the suspected high limit s/w if the unit runs then you have your answer, but never, never leave the high limit switch jumped w/o the switch.

Posted on Oct 23, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 61 Answers

The limit switch is usually a little fiberglass board (2" x 3") with two wires going to it. Usually held in by two 1/4" or 5/16" hex screws. These go bad if you have insufficient air flow through the furnace.(dirty filters,undersized supply or return ducts)
Sometimes they will reset if you tap on them or clean them.
The limit control will have a rating printed on it stating its trip and reset temps.(L170 - 30f or something like that) Make sure to replace it with the same rated switch.

Posted on Jan 02, 2009

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 12 Answers

We have the Ameristar furnace and we had a SUPER dirty filter! All of a sudden, we were only getting cool air. The flames stopped coming out of the 4 ports in the base of the furnace and it was just a working "blower" going.

I took the advice of one of the other posts on this thread and I tapped on that circuit board with a piece from my motorcycle trailer. A few sparks shot off - because the metal apparently touched one of the electrical posts and also the little bolt that holds the fiberglass circuit board on. All of a sudden, the furnace got quite...then reset itself and started running again! A nice, orange glow occurred...then blue flames came up! There she was...back again!

Put in a clean filter - and I will NEVER let it get that dirty AGAIN, ever!!!! But these guys know what they're talking about...I just had to confirm that tapping on the circuit board worked for me - instantly!

Posted on Jan 07, 2013

1 Suggested Answer

  • 1 Answer

SOURCE: goodman furnace 4 blinks

In the compartment with the blower moter there is a little (button) with two wires going to it.(it is attached to the top (you will have to look up in the compartment) if the unit is installed up and down and not on the side.) (If it is in sidways it is in the section between the two comartments). anyways.... on mine there is a little reset button right between the wires.... press it and see if it makes a click sound. try your start up procedure and see if the problem goes away... I don't know if MY equipment got too hot or if the switch is failing... but it worked for me.

Posted on Mar 04, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Goodman furnace model gmp125-4 constant fast blinking red light on circuit board, furnace dont work, have moisture in bottom from seeping drip pan under acoil


There should be a chart pasted to the inside of the front access panel of the furnace. It will tell us what that particular blinking sequence means. Goodman isn't listing a gmp125-4 furnace so I need to assume it is a condensing gas furnace. I water has backed up into the draft inducing fan, the furnace will shut down. There is no reason for water dripping from the drain pan unless your A/C is running and the drain on the pan is plugged. Give me all the info. you can and exactly what is happening. Please look up the coded problem for me. I'll watch for your reply. I hope this is not too late to help.

Oct 07, 2013 | Heaters

1 Answer

Goodman furnace model#GCH90904CXAB the red light


This model is equiped with a diagnostic error control. Take off the front panels and look for a wiring diagram pasted on the reverse side of the panels. On this diagram there will be a chart telling you what 4 blinks represent and where to start looking for the issue. I suspect the air filter may be dirty or the pressure switch may be bad, however make sure the condensate hoses are free of any debris. Good luck to you!

Apr 25, 2010 | Goodman Heaters

1 Answer

Gmt090-4 furnace the igniter and gas valve relays both kick out when the gas valve tries to kick in


This unit is equiped with a diagnostic light and will blink a number of times indicating where to start looking for the problem. Find a small viewing port that looks right on to the control board. Count the number of blinks. Then find the wiring diagram and there will be a diagnostic chart where you can compare what the number of blinks represent. Let us know what you find.

Oct 17, 2009 | Goodman Heaters

1 Answer

Goodman furnace 4 blinks


In the compartment with the blower moter there is a little (button) with two wires going to it.(it is attached to the top (you will have to look up in the compartment) if the unit is installed up and down and not on the side.) (If it is in sidways it is in the section between the two comartments). anyways.... on mine there is a little reset button right between the wires.... press it and see if it makes a click sound. try your start up procedure and see if the problem goes away... I don't know if MY equipment got too hot or if the switch is failing... but it worked for me.

Dec 21, 2008 | Heaters

2 Answers

Goodman furnace blinked 1 time


Furnace attempted to start but failed after so manay tries. This may help you.

Sequence of operation, Gas Furnace.

On a call for heat, the 24 volt thermostat sends a signal to the control module. The control module will indicate a call for heat with a light on the control either blinking or remain solid depending upon model. The inducer (exhaust) blower will purge all gasses from the furnace and pressurize a pressure switch. Once the pressure switch tells the module to continue, the electronic ignition will energize and send 120 volts to the ignitor. The ignitor will glow and you will be able to see it if viewed thru the small inspection port. Once the ignitor gets hot enough, it sends a signal to the module opening up the gas valve (24 volts). Either a pilot will come on or the burner tube will ignite then spread the flame to all burners. Lastly a safety sensor will be looking for a certain temperature within a few seconds and the furnace will continue to operate and the room air blower will turn on in a minute or two.

What could go wrong? The unit will not run if there is no signal from the thermostat (bad thermostat or broken wire), the control module does not sense a signal from the thermostat (bad control), the inducer does not energize (bad motor), the pressure switch does not close (blocked vent piping, bad switch, plugged condensate hose), the ignitor does not energize (bad control, bad ignitor), the gas valve does not open or there is no gas (bad gas valve, broken wire, no gas), the pilot does not lite (dirty pilot), the burner does not lite (bad burner, plugged orifice, not enough combustion air), the flame does not spread to each burner (bad flame spreader, dirty flame spreader, more bad burners), the flame safety sensor does not detect flame (dirty or bad flame spreader, bad flame sensor, broken wire, bad control), or the room air blower does not energize (bad fan motor, bad control).

Most newer furnaces will have a diagnostic center or control built into the control module. You may be able to view it as it is running thru a small viewing port. Some models will require the removal of an access panel prior to finding it. On the reverse of the access panel, there will be a diagnostic chart that will aide you in understanding any error code recorded (usually a blinking light).

This is why we technicians earn the big bucks!

Dec 05, 2008 | Goodman GMS90703BXA Heater

1 Answer

Goodman heater..no heat


If you look thru a small viewing window, you will notice a small LED light blinking. Count the blinks and then remove the front access panel. On the reverse side you should find a diagnostic chart indicating what could be the issue based on the number of blinks.

Nov 25, 2008 | Goodman GMS90703BXA Heater

1 Answer

Goodman Heater


This furnace has a diagnostic light on the control board found in the lower section of the furnace. Pilots are a thing of the past and your system has a glow ignitor. Look thru a small viewing port to see how many blinks are being displayed. Then remove the access panel and on the reverse side of it is a diagnostic chart that will tell you where to start looking. I would suggest you make sure the air filter is clean and that the condensation is being removed. Recycle the furnace with either the breaker or emergency switch. You can cycle the furnace with the front cover off if you tape the door switch closed. It may be easier to view the sequence of operation to pick up on where the fault is occuring.

Feb 24, 2008 | Goodman GMS90703BXA Heater

1 Answer

Model GMP100-5-REVA


You could have a limit switch that opened. On the reverse side of the furnace access panel there will be a diagnostic chart indicating what 4 flashes indicate. If it is an open circuit, why is it open? Did the unit get too hot and why? Unless you have the diagnostic capabilities, call a professional.

Jan 04, 2008 | Goodman GMS90703BXA Heater

1 Answer

Goodman heater


OK, we will need to perform a simple test of the furnace to see exactly what is going on. Set your thermostat to 10 degrees higher than you normally do so we know that there is a call for heat. Then at the furnace, there will ba a small viewing port. Watch the blinking light and record all the patterns it blinks. After a minute or so, place your hand on the PVC vent pipe(s) to see if they are warm. If not, either the thermostat is not sending a signal to the furnace or we will need to look inside the furnace to see what is happening. But if one of the PVC pipes is getting warm, place your hand on the plenum on top of the furnace connected to the ductwork. You shoul feel the metal starting to get warm. If the blower does not turn on within two minutes, there is an issue with either the blower itself or the control board.

Getting back to if one of the vent pipe(s) don't get warm. Using a piece of duct tape or electrical tape, after removing the furnace access panel, tape the door safety switch down. The furnace will now try and cycle. A small fan attached to the vent pipe should run, then it will create suction on a pressure switch that will energize the ignitor. You will notice an orange glow thru a larger viewing port looking into the burner box. After a few seconds, the gas valve will open and the ignitor will ignite the gas. The orange glow will turn to a blue flame. Now after two minutes or less, the blower should turn on. If one of these steps don't happen, you should document it and let your technician know. As far as the blinking lights, these are diagnostic codes that will tell you where to look for the issue. On the rerverse of the access panel, there is a chart that gives a simple explanation of what the blinking represents. Again, let your technician know what you discovered. Keep in mind that the furnace will cycle or attempt to start 3 times before it will blink an error code.

Remove the tape and reassemble the access panel. Yes you will need to contact your technician but the steps you performed just saved you 30-40 minutes of diagnostic time.

Nov 24, 2007 | Goodman GMS90703BXA Heater

1 Answer

Goodman GMPB-75-4 Rev 13


Is there a diagnostic chart either on the reverse side of the blower door or in your owners manual. It may help you to narrow down what is going wrong.

Operate the furnace with the access door off of the furnace and the blower door switch taped on. Watch the furnace and document what happens. Note if the flame starts but goes out in a few seconds and let me know what you experienced.

Nov 17, 2007 | Goodman GMS90703BXA Heater

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

4,140 people viewed this question

Ask a Question

Usually answered in minutes!

Top Goodman Heaters Experts

paulcarew

Level 3 Expert

1862 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

Loading...