My Gas Furnace model# PBKM-LD20N140A will not fire. Indicator light flashes 3 times to indicate that the pressure switch is stuck open. I am led to believe that my blower motor is the problem, but I cannot find a reset switch. Is this possible that there isn't one or could it be somewhere else other than the motor itself? Or maybe I am on the wrong track can anyone help me?

Question edited for typos.

Gas furnaces has safety features to prevent explosions. If anything is thought to be faulty, nothing works. All gas appliances must be repaired by a registered gas technician. The two pressure switches are $76 and $29 if you want to risk it.

https://www.goodmanparts.net/category/goodman-gmv950905dxa-gas-furnace-oem-repair-parts

There is videos and help here. Check the hose on the pressure switch.

https://www.google.com/search?q=Goodman+GMV950905DXA++low+fire+pressure+switch+stuck+open

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Trane XV80 hard lockout, 2 flashes, Can't be reset - DoItYourself ...

www.doityourself.com > ... > Gas and Oil Home Heating Furnaces

Jan 10, 2013 - The only way I can get diagnostic Red LED light to reset is to switch ... a2 flash with absolutely no operation from the furnace does seem to ..... inducer gets a demand you should get a pressure switch error code 3. ... the flame sensor wire and giving the furnace a heating demand after resetting power twice. Luxaire Furnace Blowing Cold - 8 Red LED Flashes
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7 Tips and Tricks to repair your Furnace DIY - YouTube

? 13:25
https://www.youtube.com/watch?v=rAtcvPqUsBA
Dec 18, 2012 - Uploaded by JRESHOW .
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

Gas furnace fault or error codes for common furnaces - Gray ...

www.grayfurnaceman.com/-ifc-failure-codes.html
Each color will also flash a specific number of times to signify a specific error. ... 4 redcolored flashes may be signaling that the "high-limit" switch might be open. ... 3 green colored flashes on your furnace has the same meaning as 2 green colored flashes. ....If a system problem occurs, a blinking LED shows a fault code.Missing: xenon

7 Tips and Tricks to repair your Furnace DIY - YouTube

? 13:25
https://www.youtube.com/watch?v=rAtcvPqUsBA
Dec 18, 2012 - Uploaded by JRESHOW .
Flash sequence codes 1 through 11 are as follows: LED will turn "on" ... 4 RED FLASHES: This indicates that the main limit switchhas opened ... This no-light condition occurred 3 times (2 retries) during .... My furnace trane xe80 is only flashing once my manual says something about flame being locked out ...Missing: xenon ‎efficiency

You didn't provide very much information, but I will try to help you. Here are some possibilities.

1. The pressure switch may not be closing, or is stuck closed all the time.

2. If this furnace has a hot surface ignitor, it may be faulty or not getting voltage.

3. If this furnace has spark ignition, the module could be faulty or the ignitor may not be positioned correctly.

4. The gas valve may be faulty, turned off, or may not have gas pressure to the valve.

There may be other issues, but I tried to cover the most likely causes. I hope this helps!

Have to know the model and serial of the furnace.
locate code list usually inside or on the back of a door.
Operation sequence= call for heat--inducer blower motor--makes pressure switch--signals board to bring on hsi--after a set time gas valve opens and you have ignition--main blower motor comes on after a set time

TRI-COLOR (DSI LED) DIAGNOSTIC TABLE
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
flame sensor, a disconnected or shorted flame sensor lead or a
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.

Depends on the system,if it has 2 wire switch it can be bypassed,but only 1 time for each heating cycle if the system is using i pc board to operate the furnace,sometimes you can take the hose off and lightly suck and blow on it if the switch is stuck,but should have a pro check it,could be a blocked flue pipe or other dangerous problem,and could be a bad switch,did heating and cooling for 30 years

Clear the little hole where that hose go to the inducer case

Sorry to read about your problem, I hope this helps you out.

If you open the covers, you will see a round blower, then you will see a little rubber hose, that goes to the pressure switch... if its snowing..it maybe blocking you air intake pipe at the house...

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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
increases