Furnace

[16ACE27]

Originally Posted by jbwilli1

This should be a 50A unless you see something different.


Attached are 2 photos of the circuit board, the door was well sealed & inside dry.


Best I can see is 2 screws holding it in one on right & one deep inside. Circuit board is mounted upside down? maybe to keep water from pooling?


You guys are the best, I'm getting smarter on this rig everyday!!!

You have the "New Improved" mounting for the circuit board which is supposed to make it less susceptible to getting wet.

[abjbrtd]

Have you tried the reset switch?

There is a red led on the circuit board, is it blinking?
After the reset and a retry to light if the led isn't blinking we'll need to do more research.

[jbwilli1]

Originally Posted by abjbrtd

Have you tried the reset switch?

There is a red led on the circuit board, is it blinking?
After the reset and a retry to light if the led isn't blinking we'll need to do more research.

I tried the reset, didn't feel a click, kinda more like a slide switch would feel, smooth?


I didn't see a led blinking.


Heater will run & light for a few minutes & then shut down.

[Hugh.vines@att.net]

If your furnace only runs for a few minutes then flips off automatically, the flame sensor might be faulty. The flame sensor is responsible for monitoring the gas burner. If the furnace starts then shuts off instantly it may be because the flame sensor is not able to identify the flame and the control board will shut off voltage to the gas valve interrupting the heat cycle. The problem can be solved by merely cleaning the flame sensor, but if the issue persists, you may have to get the flame sensor replaced. You can use a soft abrasive pad to clean the flame sensor.

[16ACE27]

Originally Posted by jbwilli1

I tried the reset, didn't feel a click, kinda more like a slide switch would feel, smooth?


I didn't see a led blinking.


Heater will run & light for a few minutes & then shut down.

It's a simple ON/OFF rocker switch, turning it OFF "RESETS" the control board.

When your furnace turns off the flashes on the LED are supposed to help you troubleshoot the cause.

[abjbrtd]

Originally Posted by Hugh.vines@att.net

If your furnace only runs for a few minutes then flips off automatically, the flame sensor might be faulty. The flame sensor is responsible for monitoring the gas burner. If the furnace starts then shuts off instantly it may be because the flame sensor is not able to identify the flame and the control board will shut off voltage to the gas valve interrupting the heat cycle. The problem can be solved by merely cleaning the flame sensor, but if the issue persists, you may have to get the flame sensor replaced. You can use a soft abrasive pad to clean the flame sensor.

Could also be the "sail switch".
Without info from the control board ???

jbwilli1

The led is on the bottom back corner of "your" board.
Might be hard to see, wait till dark to do a reset and start. After it fails look for a solid on off or blinking led.

[ggoguen]

Sounds like the Sail switch malfunction

[Wilby]

My RV Mechanic told me yesterday they are working on a lot of heaters. I asked him what was the most common problem. He said it was the controller boards going out. Either they get wet or worse yet very dusty and eventually short out.

[RCouch]

I had a similar situation in OKC. We lost power while plugged into shore power. We plugged into other nearby posts and still had no power. So I thought the problem was the converter. So after installing a new one, we found that wasn't it. After talking with the campground's RV handyman, we looked at the automatic switch and found a loose neutral wire. You can tell which one has gotten loose. It'll be the one that is no longer white at the end. It'll be brown instead from the heat it generated. Simply turn off all your power to be safe, re-strip it, and reconnect it. Hopefully that will solve your problem.

[jbwilli1]

UPDATE
CW checked it out & found the circuit board was bad. 13 months old & limited use. Not a very good product.



I'm gonna get a board from Dinosaur as a back up.

[16ACE27]

Originally Posted by jbwilli1

UPDATE
CW checked it out & found the circuit board was bad. 13 months old & limited use. Not a very good product.



I'm gonna get a board from Dinosaur as a back up.

Thanks for the update. Unfortunately an all too common problem with the Atwood control boards. Both my water heater and furnace now have Dinosaur boards in them.

[Jann]

ok where is the sail switch located in the furnance??

[Jann]

where is the sail switch in 2016 thor ace 30.1

[Jann]

where is the flame sensor in 2016 thor ace 30.1