Sure,,, or it could be something else.
I was on a service call today, 80% upflow goodman furnace natural gas. Burners would light up for 5-10 sec, then cut off. I cleaned flame sensor with sand paper,still same results. Microamps were 2.2. Can it be the circuit board not taking in the proper signal from flame sensor
Sure,,, or it could be something else.
...
Not enough info, flame sensor description isn't enough for us to know what going on with the unit.
Like what
Be sure you have a good ground. BTW, sandpaper is not recommended for cleaning flame rod (I have done it too). I try to use steel wool as this doesn't possibly insulate flame rod. One time I had to replace control board that wouldn't see flame signal.
Where should i check the ground
I did check the high voltage and low voltage ground, they were firm and secured
what was your ua?
2.2
What is your microamp signal like Core_d is asking?? need to check it at sensor and where it connects on board.. Never clean with sandpaper, believe it or not it can ruin it.is your pressure switch opening up causing them to go out? It could be a million different things.. Need more data
I did check the pressure for any debris and was clean, i did put My probes on the sensor and the wire that connects to the board to get a 2.2ua.. I did call one Of My senior tech and he told me to check for proper ground,it looked secured as i checked them. Ive ordered a new board.
I did check for gas pressure and was 3.5"wc. Next i removed all burners and cleaned them out. After all this, still had same symptoms. What should i do next guys
Thanks bro
I would start by checking from your "neutrals" on the board to any place on the chassis that is a good ground, make sure the unit is calling for heat. Also read it from the flame sensor to chassis and then to neutral on board, again make sure the unit is calling for heat. your going to read a .03 volts, maybe a little more or less, anymore you have a grounding issue.
__________________________________________________ _______________________
“Experience is a hard teacher because she gives the test first, the lesson afterwards" ~ Vernon Law
"It's what you learn after you know it all that counts." ~ John Wooden
"When the teachers become unteachable we're all in trouble" ~ Mr. Bill
"Remember "Pro" is only a name, it's not always a mindset determined to do everything correctly" ~ Mr. Bill
I had to go back and edit the volts don't know what I was thinking, No just read from the way I listed it, you don't have to to disconnect anything. I had a 1993 Ruud unit last week that I discovered a bad ground on from the flame sensor to the board, it was acting the same as your unit. Most of the time I find it's a bad sensor or board, and I was just about to condemn the board when I discovered a bad ground. The ground wire from the sensor to the molex plug was loose, I have a tool to take out the pins in the molex plugs, and I just installed a new pin and it was good to go.
__________________________________________________ _______________________
“Experience is a hard teacher because she gives the test first, the lesson afterwards" ~ Vernon Law
"It's what you learn after you know it all that counts." ~ John Wooden
"When the teachers become unteachable we're all in trouble" ~ Mr. Bill
"Remember "Pro" is only a name, it's not always a mindset determined to do everything correctly" ~ Mr. Bill
__________________________________________________ _______________________
“Experience is a hard teacher because she gives the test first, the lesson afterwards" ~ Vernon Law
"It's what you learn after you know it all that counts." ~ John Wooden
"When the teachers become unteachable we're all in trouble" ~ Mr. Bill
"Remember "Pro" is only a name, it's not always a mindset determined to do everything correctly" ~ Mr. Bill