Clothes washer overflow/stoppage
I ran a load of clothes and my Kenmore (1 yr old) washer overflowed from the standpipe. I had this problem last summer and had two plumbers "fix" the problem until now. Plumber #1 elevated the drain pipe to provide more vertical drop and increased the length of the stand pipe. He also tried to jet spray the drain pipe. It worked for a very short while. Plumber #2 roto-rootered the main line plumbing stack from the basement to the city sewer line. The over flow from the floor drained was partially fixed. I purchased heavy duty drain cleaner and poured it in the floor drain and unclogged it. No problems since then.
Finally, it has been quite cold here (15 degrees F), though today is much warmer (> 32).
Suggestions?