Good morning ,
I have this problem with Coleman DGU10014UB furnace: furnace starts fine ,pilot light comes on ,gas gets ignited , blower motor is on , flame stays on for about 15-20 secs , than goes out ,but circulation motor stays on , and the cicle goes again , but there is so little heat that furnace stays on for 30-35 minutes , and it takes longer than ussual to get heat on thermostat , self diagnostics light blinks 10 times , so I had drain lines cleaned , as well the condesate collector, still the problem has not been solved.
Couple years ago I had to replace the circulation motor due to balancing problem and the squerel cage , but it was running OK until this winter , and it was running OK in the summer time. From time to time we had to rest the furnace , because it goes out.
Any help would be greatly appreciated!
!P lease, help , thank you!
:( Also , the fireplace sometimes goes out in the middle of running , than we have to restart it , could be low gas pressure??

Since you are experiencing problems with more than one gas appliance, a check of the supply gas pressure would be in order. This should be done with the furnace and/or fireplace running. 10 blinks? Do you know the translation?

Yes. 10 blinks means problem with drain , but as i said, i had all lines cleaned up. Thanks! Any other ideas?