Question about Goodman GMS90703BXA Heater

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Failure to establish flame

I'm getting the 1 flash LED code due to a failure to establish flame. Looking at the troubleshooting chart, the most likely reason seems to be an improperly connected flame sensor. The unit is less than 2 years old, and in excellent condition. I had an issue with the A/C a few months ago, and my guess is that the service person that fixed the A/C problem inadvertently did something that caused the heat not to work (we didn't test the heater after the A/C fix - I learned something there). It's definately not a pressure switch stuck open (though I guess it could be a faulty pressure switch). holding the pressure switch, I see the igniter light up three times, no flame, then lockout with the 1 flash code. any help in checking if the flame sensor is connected properly would be greatly appreciated. I can't seem to figure it out from the wiring diagram. thx much.

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  • Anonymous Nov 10, 2007

    my unit runs for about 10 minutes then i get 4 blinks the fan run for a while then it turn on again

  • cgabisalih Mar 23, 2009

    Goodman GMS80703ANA. Thermostat calls for heat, blower fan activates, Hot surface igniter glows, gas valve opens (can hear the gas rushing. Tries 3 times then auto shutdown. NO HEAT. All seems to perform properly. Gas turns on toward the end of the igniter glow period, almost like there is too long of a delay. Please help.

    Is there a thermocouple that senses igniter temp that may be shutting out. The manual mentions nothing.

  • Anonymous Mar 15, 2014

    fuel injection control moduale checks good all input sensors are good truck runs rough/misses no codes present fuel supply is good no visible leaks fuel pressure is good electrical connections good dont know if its a mechanical or electrical issue with injectors im aware there are many issues with 6.0 injectors need to find out if its an injector or another part and how to test 6.0 diesel injectors



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  • 42 Answers

I the electrical gas switch valve set to on? If not...

Is there also a gas valve and is it on? If so...

Does the exhaust fan turn freely?
If not then then electrical gas valve will not open the gas valve. I have seen these bearing get loose and then the exhaust tips toward the inside inhibiting the fan from turning. Note: this is not the large blower but a smaller fan for the exhaust fumes.

Is the Vacuum hose from the exhaust to the sensor in good condition and attached at both ends? If not fix hose or connect both ends.

When repairing a unit, many tech will turn off the gas for saftey.

Posted on Nov 10, 2007


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Error code= two red flashes, lockout/ no flame

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cause this fault. 2 RED FLASHES: This indicates that thenormally open pressure ... The furnace will lock out for one hour and then restart. 7 RED FLASHES: This fault code indicates that the flame could not be established. This no-light ... problem. Bothheating and cooling operations will be affected. Check

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I have mitsubishi vs 60719 chassis vz9 will not power up error code 21 all standby voltages are good 5 fuses are good when plugged in led 3 flashes led stays on for 15-20 sec no relay clicking or any...

most of the time the convergance ic go bad:
but try this:
The 3 flashes of the led when you plug the unit in is the
microprocessor initializing.

This unit has an error code diagnostics.

On the front panel of the unit press and hold the INPUT and MENU
buttons at the same time and hold them down for about 5 or 6 seconds.
The unit should activate it's error code mode.

The led will flash count the number of flashes. It will then pause for
1/2 or 1 second. The led will flash again count the number of flashes.
The unit will repeate this for about 5 or 6 times.

You now have the two digit error code. The first time the led flashed
is the first number of the error code, the next time the led flashed is
the last number of the error code.

12 ----------- indicates no error
21 ------------- X-Ray Protect circuit
22 ------------ Short Protect circuit
23 ------------- Horizontal Deflection failure
24 ------------- Vertical Deflection failure

Most units give a error code "22" short protect circuit. If so check:


If Q5A00 check bad there are other parts that have to be checked or

If you are able to do above call a tech to service the unit

Sep 17, 2008 | Televison & Video

1 Answer

Tractorman44 thanks but misunderdstood husband! When thermostat turned up the fan comes on before flames ignites. Plenum heats and furnace runs.

If the fan comes on first, then the flame ignites, it USUALLY indicates there is a problem in the ignition process of the furnace. Most new manufacturers have the adjustable 'time off' sequence for the blower, and most initiate a call for the blower to run within a pre-determined amount of time AFTER a call for heat has been established. ALSO, and this is where I think the problem is, the ignition sequence starts immediately upon a call for heat. If there is a heat ignition failure, it will attempt a restart. USUALLY, they allow 5 restarts within a certain timeframe then the circuit board locks out the heat sequence until it is reset by cycling the power or cycling the thermostat manually.

What I think is happening with yours it that your ignition sequence is experiencing a 'flame failure' upon a call for heat....then it re-establishes the ignition sequence, which takes another 30 to 45 seconds. During this time, the blower automatically starts (because the allotted time has expired) and blows COLD air because of the initial flame failure. In the meantime the ignition sequence establishes a flame on the second or possibly the third try and then you feel the warm air.

IF this is the case, ultimately what will happen is that the furnace will continue to experience 'flame failure' and eventually fail to the point of 'flame failure lockout' and you will have no heat, but the fan could possibly run continuously.

At any rate, without being able to be there to troubleshoot and test components physically, this is just a calculated and reasonably reasonable guess. What it is telling you is that you probably need to contact a reputable, reliable service organization to give your furnace a good going over before it lets you down on a good cooooold night!!!

I hope this helps you understand the basics of what happens within the system and bear in mind, this is a 'generic' sequence and possibly NOT the exact sequence of your particular furnace.

Oct 01, 2015 | Heating & Cooling

1 Answer

Protech 62-24084-02 troubleshooting

62-24084-02 LED CODES
ON - Normal
OFF - No power to board
One Blink - One hour retry delay
Two Blinks - Pressure switch failure (remains open)
Three Blinks - Limit switch fault
Four Blinks - Pressure switch failure (remains closed)
Five Blinks - Twinning fault
ON - Good flame
Rapid Blink - Flame present with gas valve de-energizing
Slow Blink - Marginal flame

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1 Answer

Hi, the lights on my circiut board are flashing the one on the left is on all the time and the one to the right of it flashes two times and then waits and then flashes two times again

Error Codes
A green LED indicates system faults
Steady On: System OK
Steady OFF: Board control fault or no power applied
1 Flash: Ignition failure (control in one-hour lockout)
2 Flashes: Pressure switch fault, fails open (switch is
stuck open)
3 Flashes: Limit switch open (main or auxiliary)
4 Flashes: Pressure switch fault, fails closed (switch is
stuck closed)
A yellow LED indicates flame status
Steady on: Normal flame is sensed
Flashes: As flame weakens, frequency of LED flashes

hope this is helpful.

Dec 21, 2010 | Ruud Central System Air Conditioner

1 Answer

I have a gmn-080-4 furance,I'm getting the 1 flash LED code due to a failure to establish flame.PLEASE HELP

The 1 light flash is because of a rollout switch being tripped. they are little switches usually with a red reset button in the center, Sometimes they are a one time burn out device. If they are tripped try to find out why they tripped and fix the problem.
You can find out more here... go to page 39

I hope that this will help you to solve your problem!

Thanks for using Fixya!!


Dec 14, 2009 | Goodman GMS90703BXA Heater

1 Answer

Armstrong upflow,unit works intermittent problem,call for heat nothing happens,error code of 5 blinks then 6 blinks. i have no manuel, and the panels dont have the codes on them. anyone have access to the...



LED Status Fault Description
No Power to the System Control

Steady Flash (11 or more flashes with no pause)
Normal Operation (Standby or call for heat)

2 Flashes
Pressure Switch Closed When It Should Be Open

3 Flashes
Pressure Switch Stuck Open 30 Seconds or Longer After Call for Heat (System in 5-minute delay mode before next call for heat). On/off switch in "off" position during a call for heat will generate this code.

4 Flashes
Open Limit Switch or Limit Switch Circuit

5 Flashes
Flame Sense Signal Sensed Out of Proper Sequence

6 Flashes - pause - 1 Flash (see Note 1)*
Soft Lockout Type 1 (Failure to light within 4 trials for ignition)

6 Flashes - pause - 2 Flashes (see Notes 1 & 2)*
Soft Lockout Type 2 (Flame sense lost during run)

6 Flashes - pause - 3 Flashes (see Notes 1 & 2)*
Soft Lockout Type 3 (Pressure switch opened during run)

6 Flashes - pause - 4 Flashes (see Notes 1 & 2)*
Soft Lockout Type 4 (Limit or limit circuit opened during run)

6 Flashes - pause - 5 Flashes (see Note 1)*
Soft Lockout Type 5 (Flame has gone away after Error Code 5)

6 Flashes - pause - 7 Flashes (see Note 1)*
Soft Lockout Type 7 (Self-check failure)

10 Flashes* - SV9520H8034 only
Line Input Voltage Polarity Reversed

Dec 12, 2009 | Coleman Heating & Cooling

1 Answer

Meaning of rudd furnace trouble codes

Error Codes
A green LED indicates system faults
Steady On: System OK
Steady OFF: Board control fault or no power applied
1 Flash: Ignition failure (control in one-hour lockout)
2 Flashes: Pressure switch fault, fails open (switch is
stuck open)
3 Flashes: Limit switch open (main or auxiliary)
4 Flashes: Pressure switch fault, fails closed (switch is
stuck closed)
A yellow LED indicates flame status
Steady on: Normal flame is sensed
Flashes: As flame weakens, frequency of LED flashes

Dec 12, 2009 | Heating & Cooling

1 Answer

Arcoair central heat /air conditioning unit

The blower motor kicks on when there has been a 24 volt control failure.

This usually means that a limit switch has tripped.

Most likely that would be a high temp limit switch or a rollout switch.

First, make sure the filters are clean. and the evap coil is clean. If eaither are dirty/clogged, it will partially block airflow, causing the furnace to overheat, causing the high temp limit to trip.

A rollout switch typically trips for three reasons.
1 flame rollout into the burner compartment due to poor airflow.
2 overheating af teh metal plate the rollout is mounted to, due to dirty, old, rusted components.
3 a bad limit switch.

If your unit has an LED light, count the flashes and it will hepl popint out the problem.
(locate the wiring diagram/flash code list, and correspond the flash count, with the code.)

First, check filters.

Jan 14, 2009 | Heating & Cooling

2 Answers

Furnace won't stay running

Furnace fails to operate.
• Integrated control module
diagnostic LED is
flashing ONE (1) flash.
• Furnace lockout due
to an excessive
number of ignition
“retries” (3 total)1.
• Failure to establish flame.
Cause may be no gas to
burners, front cover
pressure switch stuck open,
bad igniter or igniter
alignment, improper orifices,
or coated/oxidized or
improperly connected flame
• Loss of flame after establishment.
Cause may be
interrupted gas supply, lazy
burner flames (improper gas
pressure or restriction in flue
and/or combustion air
piping), front cover pressure
switch opening, or improper
induced draft blower
• Locate and correct gas
• Check front cover
pressure switch
operation (hose, wiring,
contact operation).
Correct if necessary.
• Replace or realign
• Check flame sense
signal. Sand sensor if
coated and/or oxidized.
• Check flue piping for
blockage, proper
length, elbows, and
• Verify proper induced
draft blower performance.

Nov 23, 2008 | Goodman GMS90703BXA Heater

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