When filling washer with the temp set to warm, the washer would fill using some hot water then cold. Makes sense. For a while now, it'll switch from cold to hot (based on me feeling the water enter the tub), then then immediately switch back to cold causing the pipes to loudly bang. If I select Hot or Cold it doesn't cause the bang. Also filling the tub 1/3-1/2 way with the Hot setting, then switching to Warm does better (mostly bang-free).

Yes, I already have the $10-ish hammer arresters on both lines, and even when they were newly installed the pipes still banged.

The washer senses the temperature of the incoming water, right? Our house has an oil furnace with "Summer Hook Up" water heater. It normally takes a minute or so for the hot water to appear. I'm wondering if the washer turns on the hot, senses it's cold and immediately switches back to cold causes the hammer.

Maybe the temp sensor with age gotten, uh, pickier about the temp? I could replace the Water Inlet Valve (if the temp sensor is there, right?), but not if its going to behave the same way.

Thank you.

Thanks.

So does it make sense that the sensor might age and get overly sensitive? Is it worth swapping in a new valve?

Scott