Found manual that says 7900, 8012, 8500 series.
The heater will not keep flame on.
The blower starts, I hear the igniter coming on 3 times every few seconds, can feel some heat coming for a moment from exhaust, but than the heater turns the gas off.
Found yellow jacket nest in exhaust, but cleaning it did not help.
I know household heaters do have board that will flash code, but don't see anything like it here.
How do I troubleshoot the unit?
The heater will not keep flame on.
The blower starts, I hear the igniter coming on 3 times every few seconds, can feel some heat coming for a moment from exhaust, but than the heater turns the gas off.
Found yellow jacket nest in exhaust, but cleaning it did not help.
I know household heaters do have board that will flash code, but don't see anything like it here.
How do I troubleshoot the unit?
The new board was delivered on Sunday (!)
Have it installed and turn out that original 2004 is consider "old" board and had to call technician for help in rewiring the jumpers.
All fired up and is good.
For 2" gate valve installation, I found 2" pipe I used for central vacuum and cut short pieces of it. Glue small nipples inside the gate with Gorilla glue, that expands while it sets, so it filled up small gaps and the camper ducts slide easy on it.
All is good now. Waiting for rain season to pass.
El Ninjo sucks.
Have it installed and turn out that original 2004 is consider "old" board and had to call technician for help in rewiring the jumpers.
All fired up and is good.
For 2" gate valve installation, I found 2" pipe I used for central vacuum and cut short pieces of it. Glue small nipples inside the gate with Gorilla glue, that expands while it sets, so it filled up small gaps and the camper ducts slide easy on it.
All is good now. Waiting for rain season to pass.
El Ninjo sucks.
Ordered Dinosaur Electronics (FAN 50 PLUS PINS) Ignitor Board
$94 with free shipping on my amazon membership.
It says it is convertible to WH or refrigerator board and has upgraded circuit for turning the fan off with no ignition.
Should be here on Sunday.
Anything else worth checking?
I removed more panels around the furnace and looks to me like it is design to warm up the park more than the camper.
The lower part of furnace circulate cold air inside. No insulation. I tried to put some insulation there, but is build into cabinet so not much space. '
One of the ducts goes to tanks compartment, where via holes around the plumbing goes outside without restriction. I bought gate valve for that ducts, but gate is 2" while duct seems to be 1 7/8"
Will post update when new board arrives.
$94 with free shipping on my amazon membership.
It says it is convertible to WH or refrigerator board and has upgraded circuit for turning the fan off with no ignition.
Should be here on Sunday.
Anything else worth checking?
I removed more panels around the furnace and looks to me like it is design to warm up the park more than the camper.
The lower part of furnace circulate cold air inside. No insulation. I tried to put some insulation there, but is build into cabinet so not much space. '
One of the ducts goes to tanks compartment, where via holes around the plumbing goes outside without restriction. I bought gate valve for that ducts, but gate is 2" while duct seems to be 1 7/8"
Will post update when new board arrives.
Well.... this morning the problem come back.
Yesterday it work on sunny afternoon, today it dies on cloudy morning.
Could it be the electronic board acting?
Yesterday it work on sunny afternoon, today it dies on cloudy morning.
Could it be the electronic board acting?
BTW on picture 3 I see big hole on rounded plate, what looks like space for additional fastener.
I wonder if that was missing from the factory or PO did that.
I put it back the way it was and will not worry about it.
I wonder if that was missing from the factory or PO did that.
I put it back the way it was and will not worry about it.
enblethen wrote:
Hopefully your computer can't read and yours is an 8520. What is series II,III or IV?
You were right, that by the time I walk from the camper to computer, I scrambled the number.
It is 8520 series IV
I took it apart and had small insects everywhere, but I believe those are still from Minnesota where I bought the camper 3 years ago.
Check the gas pressure and 3 burners on cooktop would not even blink when I started WH, so I assumed it had to have good pressure.
Washed circuit board and no kudos.
So finally start taking the furnace apart. Took some observation how to do it, so here are the pictures in case somebody has to do the same.
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After taking the cover off, you need to take off the wing nut visible on the center of the picture slightly to the right.
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Than in twisting motion, pull the exaust pipe out. Mine wasn't to badly corroded, but that might be hard part.
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Disconnect gas tubing. The bottom of the compartment has rubber seal, so I could push the tubing down for burner removal.
Burner assembly is hold by 3 screws with 1/4" hex head. One is above exhaust pipe, one you can see below the valve and 3rd one is next to #2
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This is the design where igniter and probe is the same thing. The thinner wire is ground. Lot of corrosion on wire mesh and some dead insects inside.
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Wire brushed the screen and blow the insects away.
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Clean burner goes back. Did the test and the flame stays on.
I clean everything, but my conclusion is that the rust on the burner screen made the flame too small and flame probe was not getting hot enough.
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Now I noticed, that the furnace is circulating camper air against steel cover. That has to lead to pretty good heat loss, so here is my improvement.
Thank you all guys for ideas.
Stove, water heater works fine and this is electronic WH as well, but judging from other experience the furnace is more sensitive to the pressure.
Model number 8502.
I remember last time we used it was about 2 years ago, so I was hoping it is just moisture and dust, but was trying it about 20 times and we have nice sun this morning, still no lasting flame.
Model number 8502.
I remember last time we used it was about 2 years ago, so I was hoping it is just moisture and dust, but was trying it about 20 times and we have nice sun this morning, still no lasting flame.
