Atwood Furnace Doesn't Stay On
Warranty was up a couple of weeks ago on my furnace, so guess what I noticed today when I was up to do other jobs...
It's an Atwood 8525-IV.
The owner's manual does not have much really to help isolate the problem although it does have a schematic. This is the first time I've ever had a problem with a furnace, hoping for suggestions from those with experience.
Symptoms are:
Blower comes on and it seem to ignite immediately. It seems to burn poorly (smells like half burned outside and the normal 'roar' sound is more like a cough mixed with a roar. It turns off quickly and consistently after about 3-4 seconds. It tries this 3 times, then gives up and turns itself off.
There is a maintenance LED flash code, "Ignition Lockout Fault - 3 flashes with 3-second pause"
It was working well 2 weeks ago, it's been sitting since. There is lots of propane and full voltage at the control board. I checked for critters in the flue, at least as far as I can see nothing. I wiggled all the visible connectors too, one seemed a bit corroded so I cleaned that up.
The only thing I could see suspicious was it was wet on the floor of the outer compartment where the rain came in the flue hole, but the electronics and stuff seems dry and the outer compartment appears sealed well (metal is sealed at the bottom) so I don't think any got inside (it would be a bit of a rat's nest to get things apart to really confirm nothing got in).
As the obvious thing that has changed since it worked was the rain (a lot of rain and with a decent wind) I'm thinking moisture is the first culprit to check more for but given it all seems to work except the there is something wrong with the flame where could moisture have gotten in? Is there a sight hole somewhere to see the flame quality to confirm that is the issue before I start digging into the electronics?
Are there proper service manuals available online? Any other ideas what specifically to check?
Thanks in advance.
It's an Atwood 8525-IV.
The owner's manual does not have much really to help isolate the problem although it does have a schematic. This is the first time I've ever had a problem with a furnace, hoping for suggestions from those with experience.
Symptoms are:
Blower comes on and it seem to ignite immediately. It seems to burn poorly (smells like half burned outside and the normal 'roar' sound is more like a cough mixed with a roar. It turns off quickly and consistently after about 3-4 seconds. It tries this 3 times, then gives up and turns itself off.
There is a maintenance LED flash code, "Ignition Lockout Fault - 3 flashes with 3-second pause"
It was working well 2 weeks ago, it's been sitting since. There is lots of propane and full voltage at the control board. I checked for critters in the flue, at least as far as I can see nothing. I wiggled all the visible connectors too, one seemed a bit corroded so I cleaned that up.
The only thing I could see suspicious was it was wet on the floor of the outer compartment where the rain came in the flue hole, but the electronics and stuff seems dry and the outer compartment appears sealed well (metal is sealed at the bottom) so I don't think any got inside (it would be a bit of a rat's nest to get things apart to really confirm nothing got in).
As the obvious thing that has changed since it worked was the rain (a lot of rain and with a decent wind) I'm thinking moisture is the first culprit to check more for but given it all seems to work except the there is something wrong with the flame where could moisture have gotten in? Is there a sight hole somewhere to see the flame quality to confirm that is the issue before I start digging into the electronics?
Are there proper service manuals available online? Any other ideas what specifically to check?
Thanks in advance.
