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Fault Code on Dayton Gas Furnace

We are getting a Fault Code on our Dayton Furnace. It is stating that the ignition lockout due to retries. Thank you

Model Number: GF9S080C16DH11H

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  • buildthewall Mar 01, 2009

    Dayton natural gas furnace gets FALSE FLAME SENSE and IGNITOR LOCKOUT DUE TO RETRIES failure codes. What do I need to fix/replace???



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This happens when the furnaces tries to light to many times and doesnt succeed. If you stand in front of the furnace while it is coming on, you will be able to hear the problem. If its an electronic start, there will be a clicking sound, followed by the gas valve opening to start it. If it has a pilot light, make sure it is lit, then listen for the gas to come out, it will make a hissing sound. If no gas is coming out, first double check to see if the gas is turned on to the unit, if it is, then its possibly the gas valve. Oh, if it is electronic, and you hear gas, but dont see a glow inside the furnace, or no glow or gas, it could be the ignite. Hope this helps.

Posted on Dec 28, 2009


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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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Ignition lock out due to retries

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Amana Air Command 90 furnace LED light blinks 3 times pause 3 times

No. of Red BLINKS
1 Flame sensed when no flame should be present
Verify the gas valve is operating and shutting down properly. Flame in burner assemble should extinguish promptly at the end of the cycle. Check orifices and gas pressure.

2 BLINKS Pressure switch stuck closed/ inducer error
Pressure switch stuck closed. Check switch function, verify inducer is turning off.

3 BLINKS 1st-stage pressure switch stuck open/inducer error
Check pressure switch function and tubing. Verify inducer is turning on the pulling sufficient vacuum to engage switch.

4 BLINKS Open limit switch Verify continuity through rollout switch circuit.

5 BLINKS Open rollout/open fuse detect Verify continuity through rollout switch circuit, check fuse.

6 BLINKS 1st-stage pressure switch cycle lockout If the first stage pressure switch cycles 5 times (open, closed) during one call for heat from the thermostat the control will lockout.Check pressure switch for fluttering, inconsistent closure or poor vacuum pressure.
7 BLINKS External lockout (retries exceeded) Failure to sense flame is often caused by carbon deposits on the
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poorly grounded furnace. Carbon deposits can be cleaned with
emery cloth. Verify sensor is not contacting the burner and is locatedin a good position to sense flame. Check sensor lead for shortingand verify furnace is grounded properly.

8 BLINKS External lockout (ignition recycles
exceeded where flame is established and then lost)Check items for exceeded retries listed above and verify valve is not dropping out allowing flame to be established and then lost.

9 BLINKS Grounding or Reversed polarity Verify the control and furnace are properly grounded. Check and reverse polarity (primary) if incorrect.

10 BLINKS Module gas valve contacts energized
with no call for heat Verify valve is not receiving voltage from a short. If a valve wiring is correct and condition persists, replace module.
11 BLINKS Limit switch open - possible blower
failure overheating limit Possible blower failure, restricted air flow through appliance or duct work. Verify continuity through limit switch circuit and correct overheating cause.

12 BLINKS Module Ignitor contact failure Fault code indicates the module ignitor contacts are not functioning
properly. Replace module.Solid Module - internal fault condition Module contacts for gas valve not operating or processor fault.
Reset control. if condition persists replace module.
3 double 2nd-stage Pressure Switch Stuck Open/Inducer Error
Check pressure switch function and tubing. Verify inducer.

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This is a Dayton gas furnace model GF9S120D20UP11H and i am getting a flash code of ignition lockout due to recycles. how do i fix it? i have taken all the filters out and washed them and also checked...

Usually a lockout code means it tryed so many times and then it locks out or stops. First, when a furnace is locked out you have to kill the power to the furnace to reset the lockout. I don't know this furnace but there are manual resets around the burner called flame rollout switches that have buttons in the middle that have to be pushed back in. Also the power vent has to come on when the furnace gets the signal from the thermostat. This is proven by a flow switch with a rubber hose on it. The next step is a 30 sec. purge, then the igniter glows or sparks and then the main burner comes on.
The other switches are hi limit on the front wall of the heat exchanger. That might get you started. If you have anymore questions

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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.

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