8500 series furnace

[roger66ogden]

I removed the burner assembly from my 8500 series furnace because I thought the busy bee's built a nest and that was what was causing the furnace not to work. What I found was that the burner head had rusted out. If the rv shop has one in stock should have it up and running by the end of the day. Not that we need any more heat right now but will be nice to know it will work when needed.

[JohnB]

Hi Roger,

Yes, over time and use, the gas screens do rust out. If you come up short finding one, let us know we can help hunt too. Just come back with the model number or take a pic of the model tag on the outside of the blower housing.

Also for the bee's, I use the Camco stainless screens to go over the furnace exhaust port to keep the mud daubers and bees out of there. They can make a heck of a mess. This one, the Camco 42142 screen https://www.rvupgradestore.com/Camco...-p/79-8003.htm

Amazon may have them too. https://www.amazon.com/Camco-42142-F...FD6/ref=sr_1_1

Let us know how it goes.

John

[roger66ogden]

Hi John.
The Rv dealer had both the burner and the bug screen for my heater. I also changed out my black and gray water dump valves. The gray was leaking a little and the black was difficult to pull out and push in. Can't blame them for not wanting to work correctly They are 21 years old.

[JohnB]

Hi Roger,

Glad this all worked out and thanks for reporting back.

On hard to pull dump valves, this does happen from time to time. I have found that come every spring if I spray liquid silicone on the blade valves and work them back and forth, that lube seems to last all season. This helps lube the rubber seals and makes things slide better. Only use silicone spray as anything with petroleum lube can affect the rubber. If I miss a year or so, then the valve can start setting up as the next year goes on. I do the lube job and it all works again for about another year.

Now, how to get the silicone squirted up onto the blade valve, not sure how your dump valves as setup. For some dump valves the straw on the end of the silicone spray can reach in and blast the blade. Other times I have had to put the spray into a piece of plastic tubing, shove the tube up the dump pipe, then chase with compressed air and it blows it all the way up the tube onto the valve blade. See this post with pics of the process. Since my Sunline has enclosed tanks in a heated compartment, I had to come up with a way to get the lube all the way up a 4 ft or longer dump pipe and to the valve itself. You can tweak the concept to align with what yours looks like.

https://www.sunlineclub.com/forums/f...html#post74058

Thanks

John