Ed-Dans

Thanks Tom.

Tom, thanks for the comments. Everything was off but not unplugged. I believe everything was rated at 20 amps but I'll recheck. It was at least 100 feet of extension cord and it was on a GFCI outlet. How does the GFCI affect it?

Harry, thanks for the great information and photos. No, I did not find any foreign objects. The coach was not being used. The chassis batteries had gone bad and were replaced. The water level was low in the house batteries, 4 deep cycle 6v, and I added distilled water. The coach was plugged in to 20 amp service with a long extension cord in an effort to keep the batteries charged. I wondering if I did something wrong or if I need to look for a short somewhere in the coach.

Thank you for the great information. My plan is to repair it myself and then have a qualified technician/electrician troubleshoot the issue. One quick question, what would cause a physical short from the house power to the ground lug? (i.e. bad house batteries) Again, I am a novice so any information is helpful.

Here is the burnt acrylic panel that the circuit board attaches to. Does anyone know where I can find one? IMG_6641.HEIC IMG_6642.HEIC

The fire originated on this board. I believe it connects to the alternator, front electrical panel, house fuse panel, and battery isolator relay. I have attached more photos of the burnt circuit board, burnt acrylic board, electrical panel box, and manuel. Thanks for the help. IMG_6634.HEIC IMG_6635.HEIC IMG_6636.HEIC IMG_6637.HEIC IMG_6638.HEIC IMG_6639.HEIC IMG_6640.HEIC

Thanks, that helps. I appreciate it.

I have a 2012 Monaco Knight 40PDQ. This is my first motor coach and I am way over my head. Any help will be appreciated. I had a fire in the rear electrical circuit board located in the box above the chassis batteries. The box contains the battery cutoff switches and battery relay. My questions are: 1) What is the purpose of this circuit board? ( I did find a replacement on line. ) 2) Any ideas on what may have caused the fire? The coach was not being used and I had it plugged up to 20 amp extensive cord to try and maintain the batteries. 3) There is an acrylic panel that the circuit board attaches to which also melted. I assume it is some type of insulator. It needs to be replaced. Any ideas on where I could find one? Again, any help is greatly appreciated. A circuit board image is attached. IMG_6630.HEIC