Just got an older heated pressure washer. It is 12 volt with pressure switch and flow switch. Problem is there is only an on/off switch but no thermostat to control temp. How would i install one if those so i can do house washes with warm water but not scolding hot water
Don’t you let that water talk to you that way. You remind that water who’s boss.
4 Likes
But, seriously, throw some pictures up here. You didn’t give us a manufacturer, model or any other pertinent information to go off of and pictures always help anyhow.
Its an older model thats hard to find its shw 3000 gv
What is the knob with the green, white and red arrow?
Lol. 
2 Likes
That is a stock soap line
Ah, I see. You can probably just buy a thermostat and wire it in but let’s get @dperez’s advice here. He’s the true hot water tinkerer
You can run a thermostat or change the orifice in the burner so it will put out least amount of fuel
This is thermostat kit I used.
2 Likes
There may be some differences that I’m not aware of but I’m pretty sure almost all of the different thermostats are exactly the same and likely made in the same factory.
The biggest thing to pay attention to when wiring up a thermostat is not to be too rough on the wire. Because, it’s not actually a wire. It’s a tube filled with Nitrogen (I think) and if you bend it too much it’ll break and leak out.
I know that i can put a thermostat in but Where do i plumb the probe? since there is no stock thermostat spot??
You gotta take some care with it but it’s not super fragile. Just remember that thing could turn into a bomb. I’m all for you trying but if you dont have any experience find someone local who does to make sure that thing is right.
1 Like
Take a picture of the buner at the spot the pipe exits the coil
You should have something similar to what @Firefighter4hire just posted a picture of. You can see the thermostat wired in at that junction. You’ll need to wire yours in similarly. Your machine probably has a fixed thermostat so it engages the burner until it reaches that temperature. Have you tested the flow switch to make sure the burner shuts off when you release the trigger? If it doesn’t you’re probably super heating the water anytime you’re off the trigger. Like @Firefighter4hire said if you’re not well-versed in this then you really should take it to a professional. He’s not joking when he says it goes off like a bomb.
No, not super fragile but definitely don’t go twisting that wire all around the frame of the machine lol
