Hello, I have an older Miller fuel oil furnace with the Beckett burner. For some reason it won't do anything when I turn up the thermostat. I have hit the reset button way too many times already. I removed the drawer assembly and replaced the nozzle, even though I didn't think that was the problem. I have a mechanical thermostat and I removed that from the wall and bypassed that by tying the wires together. I still have nothing. I have half a fuel oil tank full of fuel. I just had the furnace cleaned 2 days ago. They fired it up for a minute before they left and everything seemed ok. Any ideas? Thanks
It's doing nothing. It's not responding to the thermostat. I bypassed the thermostat by tying the wires together to see if I could get it to run. Nothing
From your info given it sounds like you are not getting power and the motor is not even trying to run.
Start with your breaker and start checking for power. On a call for heat check for power at B1 & B2. If no power there, from the breaker - emergency switch - firomatic over furnace - switch on furnace - burner control - burner motor. It is a 120V circuit.
Until you get power to the burner the nozzle or how many times you push the reset have no bearing on your situation. Depending on how old your motor is you may have a separate reset on the motor itself.
Pics may be helpful if possible.
Have you called the service company back since they just serviced it.
I just checked the breaker with my multimeter and it read ok. Like you had stated, it's like I'm not getting any power to the burner. I operated the fan manually and that worked. I haven't called the service company yet. They fired it up and it ran for about 15 minutes probably.
With power from the panel OK then follow the circuit I posted and find out where it stops. You should have a service switch 1 door out from the basement. That is your next test point and so on. It looks like you have the old style motor. Somewhere on the motor is a red overload button. See if that popped. If so then push it in to reset and test. You can lift up the primary control where the TT is and check for 120V there or check the plug for power.
I have one of those cheap voltage detectors that I used on the outlet on the furnace where the oil burner is plugged in. The voltage detector said I had power to the outlet the oil burner was plugged in to. I checked all the wiring and it looked fine, to me anyway. I don't think my reset button on my primary control is popped up. It sure doesn't look it and when I push it, it's like it does nothing.
Unfortunately a non contact tester only checks for hot. You could have an open neutral.
Everything will check hot but with no neutral nothing will run.
I added an arrow to your first pics.
The motor reset mentioned may be on the end of the burner motor where the red arrow is pointing.
It could also be somewhere on the side as shown below.
I forgot to add. In my second picture down from the top, the little yellow light where the cad cell and thermostat is wired is lit up when I push in the safety switch on the door, without actually closing the door. Not sure if that is supposed to be lit up or?
Thanks as always. I'll do what they suggest . I've been off work on vacation and I've been messing around with this for like 3 days now. I'm kind of stubborn because usually I can figure something out. I'm almost ready to give up and call a professional.
Your meter is your best friend here. You’re going to have to trace voltage and make sure it’s getting to where it needs to go. And make a diagnosis from there.
Thanks all I think I fixed it! I finally convinced myself that the reset button on the primary control wasn't working as it wasn't sticking up and it didn't seem to do anything when I pushed it. I went and bought a new primary control, wired it up, fired it up, bled it and it seems to be working fine now.
Hello guys,
I have a gas furnace, and when I turned it on initially, it gave me a two blink code specifying that the pressure switches stuck closed.
I’ve tested everything, including the switch with a multimeter, checked the hose, check the wiring from the switch all the way back to the control board and everything seems to be working as it should be, but the second I set the thermostat to heat. It gives me that two blink code.
I verified that the vent outside is free of obstruction and I don’t see anything in the intake port on the roof.
I went as far as to replace the switch, and it still is doing the exact same thing.
I do hear the switch audibly click when I start the furnace up.
The only thing left that I can think of is the control board, but is there anyway to verify this that you guys are aware of?
Thanks for the help and I apologize if I am asking a commonly asked question, but I’ve done 1 million searches, and I cannot find the resolution.
I have a question about a furnace with an intermittent pilot, i.e. the type where a pilot is lit by a spark ignitor when the thermostat calls for heat, and after the pilot flame is detected by the flame sensor, the Honeywell S86F module opens the main gas valve to the burners.
This all works but there is a delay before the main burner comes on, and I'd appreciate knowing if this is normal. The data sheet only describes the sequence of events and doesn't say anything about how quickly the main burner should come on.
Thanks, Bob
10-13-22, 07:17 AM
