Goodman Furnace Won't Light
#1
11-01-21, 11:51 AM
Join Date: Nov 2021
Posts: 6
Upvotes: 0
Received 0 Upvotes
on
0 Posts
Goodman Furnace Won't Light
I have a Goodman furnace that has decided to stop working on me. A few weeks ago it also stopped working, but I was able to fix it by adjusting some connections, but this time I can't get it working.
When I turn it on, the blower and induction motor kick on, LED on the control board lights, then shuts off and starts blinking 6 times. Blower and everything stays on, but burners don't light and ignitor doesn't heat up.
The information inside the furnace door says 6 blinks is "rollout open", so I checked both rollout switches neither seemed to be flipped. Tried bypassing them as well but get the same error each time.
Have not gotten to check voltage everywhere yet because someone (me) left my multimeter turned on the last time and the battery died and I haven't replaced it yet. However, it seems like the thermostat is working fine and we have not installed anything new in months.
What else do I need to check and look at?
When I turn it on, the blower and induction motor kick on, LED on the control board lights, then shuts off and starts blinking 6 times. Blower and everything stays on, but burners don't light and ignitor doesn't heat up.
The information inside the furnace door says 6 blinks is "rollout open", so I checked both rollout switches neither seemed to be flipped. Tried bypassing them as well but get the same error each time.
Have not gotten to check voltage everywhere yet because someone (me) left my multimeter turned on the last time and the battery died and I haven't replaced it yet. However, it seems like the thermostat is working fine and we have not installed anything new in months.
What else do I need to check and look at?
#2
11-01-21, 12:11 PM
Group Moderator
A 6 flash code is a specific problem. If it says a rollout problem then that's what you need to check. Troubleshooting without a meter isn't terribly effective.
#3
11-01-21, 06:29 PM
Join Date: Nov 2021
Posts: 6
Upvotes: 0
Received 0 Upvotes
on
0 Posts
Got the multimeter going. Checked the rollout switches, both read as having continuity as they should. Not sure what to check from here. The blower and inducer will turn on for a few minutes and then shut off, but not happens with the gas or ignitor.
#4
11-01-21, 08:40 PM
Group Moderator
Turn the furnace power on with no call for heat. Nothing should be running.
Call for heat. Draft inducer only should be running.
After xx seconds the igniter will start to heat.
If the igniter never lights there is either a problem with the igniter or the pressure switch.
The pressure switch has its own distinctive code too.
Call for heat. Draft inducer only should be running.
After xx seconds the igniter will start to heat.
If the igniter never lights there is either a problem with the igniter or the pressure switch.
The pressure switch has its own distinctive code too.
#5
11-02-21, 05:26 AM
Join Date: Nov 2021
Posts: 6
Upvotes: 0
Received 0 Upvotes
on
0 Posts
Turned it on with thermostat turned off.
Blower and inducer started. Blower turns off after a few seconds, but inducer keeps going for longer. Eventually inducer turns off as well.
Same process with thermostat on and calling for heat.
Checked the pressure sensor w/ multimete and it is closed when everything is off and opens very quickly once the motors start.
Blower and inducer started. Blower turns off after a few seconds, but inducer keeps going for longer. Eventually inducer turns off as well.
Same process with thermostat on and calling for heat.
Checked the pressure sensor w/ multimete and it is closed when everything is off and opens very quickly once the motors start.
Last edited by PhillyTexan; 11-02-21 at 06:27 AM. Reason: Added information
#6
11-02-21, 08:20 AM
Join Date: Nov 2021
Posts: 6
Upvotes: 0
Received 0 Upvotes
on
0 Posts
More details:
Getting 120v into transformer
Getting 24v (27ish actually) from transformer
Measured 24v where transformer meets molex plug into control board
Getting 0v at any of the terminal strip (did R to C, also tried R to the others and got 0s across)
Getting 120v into transformer
Getting 24v (27ish actually) from transformer
Measured 24v where transformer meets molex plug into control board
Getting 0v at any of the terminal strip (did R to C, also tried R to the others and got 0s across)
#7
11-02-21, 09:08 AM
Group Moderator
#8
11-02-21, 02:22 PM
Join Date: Nov 2021
Posts: 6
Upvotes: 0
Received 0 Upvotes
on
0 Posts
I worded it backwards, it is open at rest and closes once the inducer turns on. I have ordered a new control board and hoping that is the fix once it comes in on Thursday. Is there anything I'm missing to check before then?
#9
11-04-21, 10:33 AM
Join Date: Nov 2021
Posts: 6
Upvotes: 0
Received 0 Upvotes
on
0 Posts
New control board came this morning, was able to swap it out quickly and easily, everything fired up right away and is running great.
Thanks for your help!
Thanks for your help!
#10
11-04-21, 10:45 AM
Group Moderator
