VilleDeal
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Re: NEED ASSISTANCE... ATWOOD AFMD FURNACE
UPDATE... After replacing the board with a Dinosaur brand, it now is working as designed. I do take responsibility for shorting the board out, but not only did it start and run after it's replacement, but did so without sooting or smelling. So while I am perplexed about what exactly did fix it, I am also happy to move on.1.1KViews0likes0CommentsRe: NEED ASSISTANCE... ATWOOD AFMD FURNACE
It has no diagnostic code flashing at all. I will recheck my test on the sail switch, I do know it was operating from closed to open after removal, just cannot remember at this point in time whether it was closed before the startup or open. Thanks, I will update when I have a change or more information.1.1KViews0likes0CommentsRe: NEED ASSISTANCE... ATWOOD AFMD FURNACE
I have now tested the limit switch and it is closed as it should be. I have also tested the off/reset switch and have resistance when it is on reset and have no resistance when it is off which should also be correct. I do have 12 volts to the board, so am I to suppose I need to replaced the circuit board at this point do you reckon?1.1KViews0likes0CommentsRe: NEED ASSISTANCE... ATWOOD AFMD FURNACE
Yes, I'm confident that the wiring is correct now per the wiring diagram. Tied the two blue thermostat wires together and still got nothing at all at last check. I took the reset/off switch to check it and the resistance of the limit switch while I am at it.1.1KViews0likes0CommentsRe: NEED ASSISTANCE... ATWOOD AFMD FURNACE
I am going to go look at it today. My rig is not parked nearby so I have to go a ways to get to it. I do have the wiring diagram in my owner's book. I am relatively sure now the wiring is correct. I will start by tying the two blue wires of the thermostat to make sure it is not the problem with it now doing nothing at all when the heat switch is turned on at the thermostat.1.1KViews0likes0CommentsRe: NEED ASSISTANCE... ATWOOD AFMD FURNACE
I sure wish now I had taken pictures but didn't. I do have 12 volts at the board. I didn't know if it would hurt to jump the circuit breaker, sail switch and the limit switch, not at the same time but one at a time? I will test the thermostat like one of you said next. Thanks again.315Views0likes0CommentsNEED ASSISTANCE... ATWOOD AFMD FURNACE
I have a 2018 class A gas unit with an Atwood afm series furnace. My problem is that it was sooting up and smelling, even to the point of sounding off the CO alarm. I thought I had a dirt dauber problem maybe so I took the unit completely apart and flushed the heat tubes. I was wrong and that is not the issue. Ran a snake from stem to stern through it and got nothing at all. Flushed it with water also and got nothing but good flow. Here where my plot thickens. Not only have I not found the original problem, but now have another one. After putting it all back together, I now have a problem with nothing at all happening when turning the heater on. I checked the wiring diagram and see not issue, however it is possible that I am overlooking something. When we first put it back together I got a single flash light on the circuit board which pointed to the limit switch. Now though, after swapping out a couple of wires that were put in the wrong place initially, I get nothing. Any ideas? Could the limit switch getting wet during the flush, could it be stuck open not allowing the circuit to be complete upon startup. ALSO, could someone send a picture of their circuit board just to make sure the wiring is correct?3.9KViews1like17Comments
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