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My name is ***** ***** My issue is regarding Goodman Furnace

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Customer: My name is *****...
Customer: My name is ***** ***** My issue is regarding Goodman Furnace gsm8
JA: Thanks. Can you give me any more details about your issue?
Customer: the furnace wont start flames
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Submitted: 2 years ago.Category: HVAC
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Customer reply replied 2 years ago
The pilot lights for maybe 3 to 4 seconds before going back out. It lights for 3 tries and then the furnace shuts off...I never get a chance to see blue flames only orange light
Customer reply replied 2 years ago
Goodman Funrace MODEL: CAPF313C6DB GMS8I have tried resetting with circuit breaker and all the basics
Customer reply replied 2 years ago
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Answered in 26 minutes by:
10/18/2015
HVAC Technician: airheatman, HVAC Technician replied 2 years ago
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8,786
Experience: Furnace, A/C and heat pump specialist.
Verified

Let me ask a few questions.

1.Is this a new installation or did everything used to work fine?

2.Do you have a volt meter for troubleshooting?

3.Do you hear the gas valve click when igniter lights?

4.Is there a flashing green light on furnace control board in blower compartment?

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Customer reply replied 2 years ago
1)It was installed a year ago and worked fine2) no3) yes4) Dont know where control board is
Customer reply replied 2 years ago
I believe I need to clean flame sensor I will be away to get steel wool from local store in about 15 minutes
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Flame sensor does not come into play until you have a flame for it to sense.

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Customer reply replied 2 years ago
I checked both of those they are both in the correct position..Im not sure if Im hearing clicking I do know that the fan turns on and that i see the light orange fire but never a blue flame
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK if we are not getting ignition, there is a light in blower compartment on board that should be blinking.Count the number of flashes between pausing and that will point us in direction to troubleshoot.

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Customer reply replied 2 years ago
where is that located?
Customer reply replied 2 years ago
No blinking anywhere sir
Customer reply replied 2 years ago
I found the area you were talking about
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK do you see the light and if so is it on solid?

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Customer reply replied 2 years ago
I see no light through the small window...Only light I see is the orange light from the igniter
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK do this. Remove the bottom panel. Then hold or tape the door switch hat panel was holding in and lets locate the light on board.If furnace as power(which we know it does) the light will be either solid or flashing)

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Customer reply replied 2 years ago
should I turn the furnace off before moving panel?
Customer reply replied 2 years ago
I removed the bottom panel and there is no light on or flashing weird
Customer reply replied 2 years ago
I see where the little red light bulb is located but no light is coming from it
Customer reply replied 2 years ago
what is the door switch hat panel?
Customer reply replied 2 years ago
light comes on!
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK keep door switch held or taped down and call for heat at thermostat.If burners do not light, the little light should blink giving us a code such as 2 blink pause or three blink pause.

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Customer reply replied 2 years ago
Ok I have both doors open should I put the top panel back on as I try this method?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Both doors can stay off right now but door switch has to be in

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Customer reply replied 2 years ago
I tried it I was in the basement holding the door switch button while my girlfriend was calling for heat with thermostat upstairs....I saw only 1 burner that was lit and no flashing lights
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK if only one burner lit, you may may have low gas pressure or burners need to be removed and cleaned.THe gas has to go from one burner to the next through little feeder tubes on burners.If all burners do not light, the flame sensor does not sense flame as it is in front of last burner to light.I would start by cleaning burners.See below:

http://i.imgur.com/XfVCkHs.png

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Customer reply replied 2 years ago
How can I find out if im getting low gas pressure? This is a fairly new furnace I doubt if the burners need to be removed and cleaned.. I could be wrong but Im no expert here and never cleaned burners before
Customer reply replied 2 years ago
is cleaning burners something I could do?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Yes. Follow instructions in link I sent.

8c7c6aa6-9c18-4d20-9fb1-559c2da4a749_Goodman burneer cleaning.png

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Customer reply replied 2 years ago
Do you think this will fix my problem?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

If it does not, we have a gas pressure issue.Either not enough pressure into valve or out of valve.Do you have any other gas appliances and if so are they working properly?

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Customer reply replied 2 years ago
I have a gas stove and its working perfectly fine
Customer reply replied 2 years ago
what about the thermostat could it be that as well? The furnace is less than a year old brand new I just dont believe its the burners
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Thermostat would not be the issue as we would not even get the one burner.If burners are clean, I would have the gas vale checked.You can do this yourself ,but would need a manometer or gas pressure gauge to do s. Valve has a fitting on inlet and outlet side to do this.WE should have 5 to 7 inches water column in and 3.5" out.Gas valve diaphragm could not be opening all the way allowing enough pressure out of valve to light all burners.

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Customer reply replied 2 years ago
how how much pressure is I'm looking for? What im trying to see how much pressure is normal standard for gas pressure from furnace?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

We should have 5 to 7 inches water column in and 3.5" out.Gas valve

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Customer reply replied 2 years ago
ok going to go to store and buy pressure gauge email you back a little later
Customer reply replied 2 years ago
Now lets say I'm not getting enough pressure? is there any way I can open the pressure up? I have the white rodgers
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Sounds good. Make sue to get a gauge designed to read gas pressure (Water column) not psig like you would use to check air pressure.

http://www.dwyer-inst.com/Product/TestEquipment/GasAnalyzers-Kits/SeriesLPTK/Ordering?gclid=CjwKEAjwho2xBRD0mpzUvsya6SgSJAAkRepSFINUDpLQALpqy8duAqcPP6bzo2z1w4MBHdULW5k6ZxoCWevw_wcB

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Customer reply replied 2 years ago
ok cool, one last question before I go get gauge...Should I have the furnace running while I check the pressure of the gas valve? Also I had my DTE come out and check my gas and its enough pressure coming into the furnace I was told just fyi
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

You will want to check the pressure as son as the igniter lights when that one burner lights.

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HVAC Technician: airheatman, HVAC Technician replied 2 years ago

We will go from here

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airheatman
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8,786
8,786 Satisfied Customers
Experience: Furnace, A/C and heat pump specialist.

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