Gas furnace turns off after 10 minutes
#1
02-11-19, 04:57 PM
Gas furnace turns off after 10 minutes
Hi guys, I am trying to troubleshoot a possible issue here. The furnace ignites and runs for abound 10 minutes and it stops. I read it could be a flame sensor, but my ComfortMaker furnace (i assume late 90s model) doesn't seem to have one everyone is talking about, that looks like rod close to the flames. My furnace seems to have integrated flame sensor into the spark ignitor, I found a part on Amazon -Q3451B2010 (https://www.amazon.com/gp/product/B0...MXUXU1Z4&psc=1), mine it looks like just like that.
Do you think this is an issue? Should i just buy it and replace it or am I looking at something else? Can this be cleaned or needs to be replaced?
Thanks.
Do you think this is an issue? Should i just buy it and replace it or am I looking at something else? Can this be cleaned or needs to be replaced?
Thanks.
#2
02-11-19, 05:23 PM
Member
What is the model number of the furnace?
What error is it failing on? If it runs that long I doubt it’s the flame sensor. Sounds more like a limit opening.
Is your air filter clean? What style filter are you using?
What error is it failing on? If it runs that long I doubt it’s the flame sensor. Sounds more like a limit opening.
Is your air filter clean? What style filter are you using?
#3
02-11-19, 05:39 PM
Group Moderator
Welcome to the forums.
It's not going to be an igniter/pilot problem. More likely a high limit like roughneck mentioned.
The model number can be found on an ID tag inside on the side wall near the burner.
It's not going to be an igniter/pilot problem. More likely a high limit like roughneck mentioned.
The model number can be found on an ID tag inside on the side wall near the burner.
#4
02-11-19, 06:43 PM
Thanks guys, the model# FBF125J20A4. How do I check for error?
I use Honeywell 10 FPR filters from Home Depot. I installed a new filter on Sunday and coincidentally this started happening right after. Could it be a bad filter? I am going to remove the filter and run without to see if it has any effect.
I use Honeywell 10 FPR filters from Home Depot. I installed a new filter on Sunday and coincidentally this started happening right after. Could it be a bad filter? I am going to remove the filter and run without to see if it has any effect.
#5
02-11-19, 07:02 PM
Member
Filter is likely too restrictive and the unit is failing on high limit.
Remove the filter and see if the problem continues.
Remove the filter and see if the problem continues.
#6
02-11-19, 07:32 PM
Wow, I believe you are correct roughneck, after removing the filter the furnace runs as expected.
What FPR rating would you recommend for this furnace then?
I really appreciate the help!
What FPR rating would you recommend for this furnace then?
I really appreciate the help!
#7
02-11-19, 07:37 PM
Member
Normally filters are listed with a MERV rating. This is the industry standard.
Without knowing your pressure drop or any other specifics I can’t suggest a specific filter beyond a basic blue fiberglass filter.
Without knowing your pressure drop or any other specifics I can’t suggest a specific filter beyond a basic blue fiberglass filter.
#8
02-11-19, 07:44 PM
Group Moderator
FPR is the depot's numbering system. (filter perf rating) Close to MERV.
What were you using previously ?
Maybe use an 8.
What were you using previously ?
Maybe use an 8.
