Atwood heater Blowing 12vdc fuse

[alpha77]

I have an Atwood 8500-IV furnace, it keeps blowing the 12vdc fuse. Blower comes on, Igniter clicks 3 times and the fuse blows. Blower is free spinning, no wasp nests, bird nests, junk, spiders, or any other obstructions. I can see ignitor, but cant get to it, need to see if its clean on gas side where it ignites. Afraid of removing heater and ending up with gas leaks lol. Any help would be appreciated, Thank you

[jlfbatonrg]

Here's an Attwod Furnace Service Manual that contains information for your 85-IV furnace. Hope it helps.

[alpha77]

Thank you Jim and Lynda, I will let you know when I fix it )

[rgreen45]

I strongly suspect a bad gas valve, drawing too many amps. Have you fixed it yet?

[alpha77]

Haven't repaired it yet and I think your correct. I isolated everything else and still blowing fuse. When I apply power it sounds like the solenoid is chattering, not staying in an open position. Gonna replace the valve as soon as I get the time to do it, thank you for your response. )

[rgreen45]

No problem. Even though I'm a certified "RV tech", I've learned a ton from the experiences of folks on this forum. I'm just happy to occasionally offer useful advice as a payback.