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Armstrong air model # A93UH1D090C16A-02, blink code reads 3. pressure switch open with inducer on. furnace will go through roll out and ignite and run for a minute or 2 then nothing. keeps giving same reading, do you think i have a blockage somewhere? or is the pressure switch hooped? furnace is only A year old

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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billyvangogh
  • 108 Answers

SOURCE: miller furnace model M3RL080 BW, code flashes open

Check your furnace filter any Limit fault code usually relates to airflow...Not enough...causes the furnace to run too hot and shut off....the furnace can be too big for your house if its new...the ductwork can be too small , also make sure your return air vents are clean and unobstructed . Your furnace can be running too long a cycle ....also if you have central air conditioning the coil for the AC in the Furnace can be dirty...restricting airflow...if all this seems ok you can usually increase the fan speed or try tunning the fan in the "On" position on your thermostat this will promote better circulation

Posted on Oct 25, 2009

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SOURCE: Need to find the pressure switch on my goodman furnace

It's mounted onto the gas valve. It will be a button or lever that you have to push in or down, depending on the style.

Posted on Nov 20, 2009

  • 1 Answer

SOURCE: I get the code 3 (3 blinks) on my Goodman

Goodman furnace new in 07 Red LED lite flashed the three code..It was frosted and iced over closing down air flow at intake and exhaust out side of house. Use a hot hair dryer if you can't dislodge.
Have had a lot of sub zero weather here.
The ignitor can be seen glowing in the top peep hole.
The Red trouble shooting LED lite is in bottom peep hole.

Posted on Jan 10, 2010

  • 111 Answers

SOURCE: Goodman GS9 propane furnace inducer motor runs continuously

it sounds like the low temp limit switch, the one that cools the furnace down with the burner off and the thermostat open, when it cools to a point the fan stops, the other switch in burner area turns burner off/on, hope this helps

Posted on Jan 31, 2010

SOURCE: janitrol furnace-circuit board code giving 3

f this is a metal vent 80% furnace,Turn Furnace off
and remove the vent that connects to furnace and see if it is plugged.

If this is a High Eff furnace witrh pvc vents for
exhaust and intake air make sure they are not plugged on the outside.

Turn thermostat all the way up,turn furnace off and
wait a few minutes.This should reset any control
board fualt.

Turn the furnace back on, if you have a glow coil
ignitor it should glow red and then the burners should
ignite. If this doesnt happen then:

On High Eff Furnace if the glow coil does not glow red, remove the combustion door to the burners,
turn furnace back on, if the glow coil glows and
burner ignites, you have an obstruction in the intake
air side. If it still does nothing then:

Use caution and remove the exhaust vent from furnace, start furnace, if furnace runs then you
have a problem with the vent system

Posted on Feb 13, 2010

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1 Answer

No heat from furnace, Goodman GMPN080-4 Rev A. Cycle is solid red status light, then 3 flashes indicating open pressure switch because the inducer fan does not come on.


Jimbo, it sounds like you are aware of the operational sequence to suggest using a voltmeter to check the actual wires going TO the combustion air fan...if there is no voltage from the board, the board is bad. Just make sure one of the high temp limits are not open... one may be in the blower compartment on some and one will be near the top of the vestibule and a roll out switch should be near the burners. They should all be wired in series.

Always check the manual reset safty switches as the first step in troubleshooting.

Nov 21, 2015 | Goodman Heating & Cooling

2 Answers

THE DRAFT BLOWER IS TURNING ON BUT NOT FIRING UP WORKING ALL DAY STOPPED OVERNITE


The induced draft motor has a induced draft proving switch that is a pressure switch , it resembles a silver round flat device about 4 inches across with 2 wires, it will have a tubing attached to it that also is attached to the induced draft assembly housing on a barbed port, this is how the induced draft is "proven" thus giving the A OK to go to the next sequence of operation which is ignition trial period, it will attempt a ignition sequence for about 30 seconds 3 times before it will lock out if it has a circuit board, if so a flashing code will be observed and the legend in the back side of the blower door will tell you the codes meaning.
What is wrong 80% of the time is the barbed port on the induced drafts assembly is obstructed by carbon and not allowing the pressure switch to "sense" / prove the induced draft motor is running. You can connect the pressure switches 2 wires after the induced draft begins, this simulates a operational pressure switch and should begin the ignition phase if all is well, otherwise if all safety's or high limits are closed, then the ignition module is bad.

This is for spark type, if you have a hot surface ignitor look to se if its broken or cracked or has a burned spot visible, if not try testing for 120 volts to it, if you read proper voltage, then the hot surface igniter is bad. 25360510-wil0gxehsfojcry3vcxysbjd-1-0.png

Jan 08, 2015 | Emerson Lennox Ducane Armstrong Furnace...

1 Answer

Frigidaire Furnace model #FG6RA-096C-16B status light blinks 3 times.


Pressure Switch is Closed with Inducer Off. The inducer will only kick on if the pressure switch is open to initialize the call for heat.

Dec 07, 2013 | Heating & Cooling

1 Answer

Armstrong air furnace


Have you checked the flue inlet and outlet to see if it doesn\'t have a wasp nest or bird nest or rocks. check the hose that is attached to the pressure switch and the port on the collector box or inducer fan motor to see if it is clear. if you take the switch off and lightly suck or blow into the port it that will close the switch. If you have a manometer you can check the pressure differential. On the pressure switch it will say what pressure in will close at ...Example .52" WC. or 1.25"WC You would attach your manometer to the tube attached to the pressure switch and start the combustion blower to read the pressure. If you have over the reading and the switch didn\'t make you will need to replace the switch. if you have less than you have to make sure the flue is open. You can check the flue with a simple trick by unhooking the flue pipe from the combustion blower and then check the pressure and you may have to unhook the air intake also. If that doesn\'t work you could have a plugged secondary heat exchanger...... Good Luck.

Nov 12, 2013 | Heating & Cooling

1 Answer

Armstrong GUK125D20-2B won't ignite


Did he check the Pressure switch was it filled whit water can you make the switch open on the pressure switch when blowing on it? Is the hose from the inducer motor opened and not blocked ? also if there is a block after the inducer motor it will not Ignite. If the Tech does not know how to check a pressure switch get a new tech.

Oct 06, 2012 | Honeywell Furnace Air Pressure Switch...

1 Answer

The furnace i have is blinking 3 times with a pause. i have checked the vent pressure switch with an ohm meter. reading is 0. blew into the hose and could hear the click of the limit switch also watch the...


Check your furnace door. Sometimes there is a legend to how many blinking lights means what. I had an issue with mine, read the code and it turns out it was hitting the high heat limit. Turns out my blower motor wasn't turning on. Replaced it with a spare and it was fixed. Find out what type of furnace, and google the name, model, and the words, 3 blinking lights. Does your furnace turn on at all? Does it start to go through the cycle then stop? This is the proper cycle of a furnace and what should happen.

Inducer motor kicks on, it runs for a little bit, about 3-5 seconds, then you should see a bright yellow glow, this is the igniter, shortly after, you should hear a click and the gas should start to flow, almost immediately it turns to a blue flame. Then your igniter should turn off and the blower motor start up.

Mar 02, 2011 | Heating & Cooling

2 Answers

Janitrol furnace-circuit board code giving 3 blinks vent pressure switch or vent blockage where do i check on system / furnace was running fine up to this point /turned it off for about 1hr. and when i...


f this is a metal vent 80% furnace,Turn Furnace off
and remove the vent that connects to furnace and see if it is plugged.

If this is a High Eff furnace witrh pvc vents for
exhaust and intake air make sure they are not plugged on the outside.

Turn thermostat all the way up,turn furnace off and
wait a few minutes.This should reset any control
board fualt.

Turn the furnace back on, if you have a glow coil
ignitor it should glow red and then the burners should
ignite. If this doesnt happen then:

On High Eff Furnace if the glow coil does not glow red, remove the combustion door to the burners,
turn furnace back on, if the glow coil glows and
burner ignites, you have an obstruction in the intake
air side. If it still does nothing then:

Use caution and remove the exhaust vent from furnace, start furnace, if furnace runs then you
have a problem with the vent system

Feb 13, 2010 | Heating & Cooling

1 Answer

Bryant Plus 90 Furnace - Blower works fine and intermittently blows warm air but will not bring house to temp set on thermostat... Get a 1-3 error (one blink and then 3 quick blinks of the LED) Thanks


PRSSURE, DRAFT SAFGUARD, AUX-LIMIT SWITCH(WHEN USED)OR BLOCKED VENT
SWITCH(WHEN USED) DID NOT CLOSE OR REOPENED (DOWNFLOWONLY)
If open longer than five minutes, inducer shuts off for 15 minutes
before retry.
Check for:
* proper vent sizing
* defective inducer motor
* restricted vent
* excessive wind
* low inducer voltage(115VAC)
* defective blower motor or capacitor
* defective pressure switch
* inadequate combusstion air supply
* disconnected or obstructed pressure tubing
If it opens after trial for ignition period, blower will come on for
90 sec. recycle delay.
Check your air filter for blockage, check pressure switch for a buildup of moisture. Make sure your inducer motor is turning and creating a vacuum to the pressure switch. Make sure all venting is clear and free of water or debris. Make sure there is no water in inducer motor and all drains are draining.

Jan 28, 2010 | Heating & Cooling

1 Answer

Furnace gas valve wont open (roll out switch failure)


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 04, 2008 | Goodman GMS90703BXA Heater

5 Answers

High limit switch open on armstrong furnace


If you know where the high limit switch is you can always cut the two wires and wire them together causing the limit to close. But what you have to watch out for is why the high limit is not closing. That means in your return air either you have a dirty return air duct, dirty filter, or you don't have all your registors open to allow the heat to escape the heat exchanger. Just watch over riding the system. The high limit switch should either be on or behind the blower, in the middle of the system right under the heat exchanger. any other questions about hvac just ask.

David

Mar 23, 2008 | Heating & Cooling

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