I noticed the hot water hose on my washing machine (SpeedQueen Top Loader) was corroded, so I decided to replace the hoses.
I bought braided stainless steel hoses and installed them.
Everything worked fine, until I pushed the washer back to the wall and the AFCI tripped.
After some confusion, I discovered that if the braided stainless hoses touched the washer's cabinet the AFCI would trip. The trip happens as soon as the unit is plugged in.
What would cause the AFCI to trip in this case?
The washer has a 3 prong plugged and metal cabinet. The AFCI is a 15 AMP Murray Combo AFCI. The LED indicates ARC fault on some trips.
I have done the following tests:
Current between cabinet and shut off valves
I checked for current between the cabinet and the brass shutoff values. My multimeter shows less than 1.4 uAMPs of current but it fluctuates. This is with the washer plugged in. This is micro amps not mili Amps, so would not expect it to trigger the AFCI unless it is bad.
Appliance Cord I checked each prong of the plug against the back of the washer. Only the ground plug shows continuity. The neutral and load are fine.
Why is the AFCI tripping?
For now, I have replaced the stainless hoses with rubber coated stainless ones so we can use the washer.
Any insights into the problem would be helpful. Want to note that this is a 1899, 3 story home with electrical upgrades done at various stages. I bought the home 3 years ago.