High velocity valve issue

[wash4me]

The valve that separates the undercarriage spray from the L arch spray seems to be malfunctioning. I'm getting water through both simultaneously when someone enters the bay. It works fine while actually washing the car. I removed the valve stem and rinsed the parts off and reassembled and it works fine for a couple days but now it's back to doing the same thing. Are these valves rebuildable or just replace? I have good coil and voltage

 

[lag]

If your talking about Mac valve. Just replace.

Lexair valves(part that Mac valve switches) can be rebuilt.

 

[whitescout]

I f you are talking about the mac valve, one thing to remember, is that water in the air lines kills mac valves.

 

[wash4me]

61952 is the Washworld part number of the valve. It's a 1 inch stainless body valve with an nc and an no. Washworld was very helpful and walked me through some tests. The valve had done this intermittently since I purchased the used machine from the dealer. The installer said, "it's an expensive part so let's see if it works itself out." I was ok with that but now that the warranty has passed and it quit completely. They gave me a discount on a valve (still about $700) and I got to install it myself.