|
10-24-2010, 03:46 PM
|
#1
|
Montana Master
Join Date: Sep 2004
Location: Leona
Posts: 6,382
M.O.C. #2059
|
Atwood heater
My Atwood Furnace is acting up. It was making a strange noise. When I opened the outside cover, the noise had stopped. However, I found a good bit of water inside from a blowing rainstorm. I ran the thermostat up and it came on fan, then the burner fired, flamed a few seconds and then shut down. Then the burner quit firing.
I noticed that what seems to be a circuit board at the top of the blower had a red blinking led light. It would blink 3 times and then pause and blink 3 times again.
Then it started blinking and at the same time, it seemed the blower would try to start. There was a lot of blinking and clicking. I finally pulled the connector to stop it.
In spite of my poor efforts at description, can any of you HVAC guys give me a clue?
|
|
|
10-24-2010, 04:59 PM
|
#2
|
Montana Master
Join Date: Nov 2003
Location: Layton
Posts: 1,048
M.O.C. #666
|
Don't know if this is any help, I just did a quick internet search:
WIRING DIAGRAM FOR 2-STAGE FURNACE
DIAGNOSTIC CHART
A diagnostic LED is located inside the exterior access cover on the outside edge of the horizontal (2) stage control board. The following graph defines the codes.
2-Stage Furnace Diagnostics
An Excalibur 2-Stage furnace must use an Atwood Digital Thermostat.
1 Low Input voltage SOFT
2 Ignition Failure SOFT
3 Open High Limit SOFT
4 Stuck Sail Switch HARD
5
Module Fault HARD
Two Stage Furnace Models 1522 & 2334 WITH DOOR AND WITHOUT DOOR
MOT = Blower Motor SS = Sail Switch LS = Limit Switch PS = Power Switch
NOTE: A SOFT lockout is a condition that is timed and will make additional attempts to correct the problem. A HARD lockout requires reset of the thermostat or turning the power switch off then back on.
|
|
|
10-24-2010, 05:16 PM
|
#3
|
Montana Fan
Join Date: Jan 2006
Location: Spokane Valley
Posts: 222
M.O.C. #5255
|
Hi Styles,
Here is a Service Manual for the Atwood furnaces.
http://bryantrv.com/docs2/docs/hflamefurn04.pdf
On page 13 they provide a table that defines the furnace diagnostics for the flashing LEDs of the Two Stage Furnaces.
Hope this helps.
Tom
|
|
|
10-24-2010, 05:23 PM
|
#4
|
Montana Master
Join Date: Jul 2006
Location: K.C.
Posts: 11,731
M.O.C. #5980
|
I would cycle it 3 or 4 times, power it off, could be the wet conditions. Your safetys will keep everything safe.
|
|
|
10-24-2010, 05:23 PM
|
#5
|
Montana Fan
Join Date: Jan 2006
Location: Spokane Valley
Posts: 222
M.O.C. #5255
|
If you know the exact model of the Atwood furnace that is installed in your RV, you can go to this site and download the Service Manual PDF for yours.
http://www.atwoodmobile.com/heating-systems.asp
Good Luck.
Tom
|
|
|
10-24-2010, 10:52 PM
|
#6
|
Montana Master
Join Date: Apr 2007
Location:
Posts: 992
M.O.C. #7128
|
I agree, sounds as though dampness has caused the issue, as mentioned, may dry out with in a few cycles. Traces of moisture on the board my best guess.
|
|
|
10-25-2010, 03:17 AM
|
#7
|
Montana Master
Join Date: Jul 2006
Location: K.C.
Posts: 11,731
M.O.C. #5980
|
You could take one of those computer dusting cans of air, and blow it in the compartment on the board and igniter.
|
|
|
10-25-2010, 04:37 AM
|
#8
|
Montana Master
Join Date: Sep 2004
Location: Leona
Posts: 6,382
M.O.C. #2059
|
Thank you for your help. It saved me a service call. This morning I opened the cover again, daubed up the moisture I could see, and reconnected the circuit board. There were no LED lights flashing. Dianna ran up the thermostat and the furnace fired right up and stayed fired. I did print up the maintenance manual for the Excalibur 8500 series with a chart of diagnostic LED flash sequences.
Ozz, good idea about the air. I had determined to use a hair dryer to dry things out if it had not started up. Guess it was just damp and those safety features protected everything.
|
|
|
10-25-2010, 07:23 AM
|
#9
|
Montana Master
Join Date: Jul 2006
Location: K.C.
Posts: 11,731
M.O.C. #5980
|
Cool Beans!
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
Similar Threads
|
Thread |
Thread Starter |
Forum |
Replies |
Last Post |
2010 Atwood Furnace
|
2flyfish |
Repairs & Service |
1 |
05-16-2015 03:29 AM |
Atwood 8535 Furnace
|
Icehouse |
Maintenance |
12 |
06-05-2013 05:47 AM |
Atwood MPD 31470
|
dgwilson40 |
Montana Problems, Problem Solving & Technical Help |
8 |
03-19-2012 07:04 PM |
Atwood Heater
|
stiles watson |
Maintenance |
6 |
12-05-2011 05:52 AM |
Atwood Furance
|
carlson |
Montana Problems, Problem Solving & Technical Help |
2 |
03-09-2005 12:09 PM |
|
» Recent Threads |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|