My Legend's water is getting too hot

Go out to your machine and hook up your water supply hose and then set up a solution hose and your wand (no vacuum hose needed). Start up the machine and run it long enough for the water to warm up and get the solution temperature up to where it should be and run hot water through to your wand like you are cleaning. Then set your wand down for a few minutes as you would on the job for furniture moving. Do all of this while being by the machine so you can see your temp gauge. After a few minutes check your solution temp and see if it is too hot, and while watching the gauge pull the trigger on the wand and hold it open for a minute. If the temperature shoots up really fast (within 15-30 seconds of pulling the trigger) then the orifice is still cloged. If the water is super hot even before pulling the trigger on the wand and does not shoot up when pulling the trigger then the problem will be something to do with the temperature controll. It could be the thermostat, a sensor, or the bypass valve. The owners manual for your unit also says that hard water scale buildup could cause overheating so if you have not done so for a while you may want to run some descaler through your machine.

The reason the temperature shoots up fast is that the water is just sitting in the heat exchanger not moving which causes overheating, then when you pull on the trigger the water moves from the heat exchanger and you see the spike in temperature. The water should always be moving and never sitting still in the heat exchanger, that is what the orifice does, it allows a small amount of water to circulate through the system and avoid overheating. If the orifice is clean there has to be a clog somewhere between the orifice and the water box that is not allowing the water to circulate. If you can, find the other end of the hose that connects to the orifice (probably somewhere close to the water box) and disconnect it. Water will probably be draining from the water box when you do this, if you have something to plug where the hose was connected to that would probably be good. After disconnecting the hose and making sure it is clear of any belts or pulleys start the machine and you should see water coming out of that hose. My guess is that there will be no water. When you cleaned the orifice did you see the small jet or plug that allows the water to circulate? it should have a hole about the size of the hole in a wand jet and this is usually where it gets pluged up.

Todd's exactly right. Also, check the line from the outlet manifold to the bypass manifold besides the line to the water box. When you take the orifice out, place a bucket under the manifold and run the unit a few seconds to dislodge any debris that hides inside the manifold itself. When replacing the orifice, you just snug it, too much torque may bottom it out and block it. Also, too much may prevent out from ever being able to be removed again.

I agree with Joe on this. One or more of your bypass lines are most likely bad. The most common line to be bad would be the one on the thermostat block. Also agree about the oriface being too tight. Don't mess with the thermostat unless you are 100% sure thats it. Also, no need to remove the bypass maninfold either.

Whatever it is, is very simple..who's nearby you?

If you're in northern Ga, I'd be glad to me meet up with you, shouldn't take just a few minutes to look at it.

I'll give you a call this week. Looks like your a couple hours from chattanooga. Would that work?

Alright man. Hope you get it. Tc

one last caution on descaling. I hope you don't mean hydochloric acid (aci-det) etc. It etches your brass and is a temporary fix and will actually cause you to descale more often. Hydramaster finally states that this will void the warranty if such things are used. The other ones work just fine...well...don't care for the citric acid one from Prochem very much....but they work just fine. Also, on older units, sometimes you can have a bad effect on the hx's . Just a word of caution. I am glad you got it though. Now that it's descaled, I would still follow the above mentioned procedures to help clean out the loosened debris.