A CH pressure sprayer PW175000AV Ser# 00842 was electrically taken apart without noting how wires were to be reattached. There are 4 male spade connectors on rocker switch which works fine. Power has white and black, female spade. Motor has 2 black wires, both female spade. Pump has white male spade and black female spade. Motor starts great, but how do I hook it up so pump works too?

If this is the male end of United States common wiring for 110 volts A.C.,the black wire is hot and it connects to the smaller width spade lug. The white is neutral and it connects to the wider lug. If there is a green it would connect to the middle round one. If this is not the connection I am writing about, then please post the make and model number of the affected device.

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JUST REATTACH SAME WIRES BACK TOGETHER USING ELECTRIC TAPE...MAKE SURE CONNECTION IS TIGHT

In all the paint sprayers I've worked on, I've only been able to repair a couple prime valves and they went totally bad a short time after that. They can be taken apart and cleaned up but in the long run you'll be much further ahead replacing it if it isn't holding pressure in your system.

It sounds like a short to me. The fuse wouldn't blow without amperage going through it.

Remove the wires at both ends of the thermal cut-off that is located in the little plastic sleeve below the pressure relief valve area and it's connected to spade connector on thermostat disc. Once removed, connect the female spade from wire to male spade on thermostat disc, and try to light now. If all's o.k. replace thermal cut-off as it is a safety feature to protect in case of flame up.
If not, get back to me.

if it is a diaphram style replace diaphram if it is a piston style replace piston how to's are easy on both just take ur time and pay attention to removal process

Look to left of burner, below pressure relief valve, behind foam cover. Letters should be THERM on one and ECO on the other. Peel foam back and you'll see a little disc, with 2 male spade connectors. Don't mix up the one marked THERM, with ECO, they are different temperature settings. You might want to remove the thermal cut-out in the plastic tube and connect the wires direct (your basically going to by-pass it) and see if that cures it first. Just disconnect one end from Therm, and other from red wire, and put red wire (female spade) on male terminal at therm. I've seen them cause similar symptoms. If that cures it, buy a new thermal cut-off and install it as soon as you can, as it's a safety item in case of flame-up from burner, it shuts of power to gas valve etc, to eliminate fire.

First-***DISCONNECT THE ELECTRICITY***. Open the back of the dryer. The element will be in a flat metal tube running from the top to the bottom of the back of the dryer. There will be a few wires connected to it. Mark where these go for reassembly. The heater wires are inside the tube. The whole assembly comes apart quite easily to replace the element. It looks like a stretched out spring.