The Wagner paint sprayer’s ready to go. You give it the trigger… nothing. The motor start humming along.
Pressure gauge show normal. But no paint goes nowhere. Your painting project are delayed.
Sound familiar? It is if you’re a DIYer or pro. Usually the tool isn’t dead.
Something small are blocking it up or stopping the spray mechanism from working. Knowing why save you the purchase of an early replacement. Electrical is rarely the issue.
Most of the time it’s either a mechanical issue or a chemical one. Something jam the valve, an air bubble gets trapped in the line or paint harden on nozzle. Basic maintenance will resolve most of these problem.
Simple blockages don’t require a tech. Just know where to look.
Wagner Paint Sprayer Trigger Troubleshooting Guide
Check the Spray Tip for Blockages
Check the spray tip first because it is easy to do.
A very small hole in the end of a Wagner tip make for a precise instrument. Dust on the spray tip or even dried paint will close the hole. That’s why so many people say their trigger doesn’t work.
Look closely at the spray tip in good light. Is there crusty residue? Yep, it’s plugged.
Never try to poke it out with any kind of metal or wire. You’ll scratch the inside cone which destroys the spray pattern permanentaly. Simply use cleaning tool provided with the sprayer or a wooden skewer and gently poke it into middle hole.
Clear Hardened Paint from the Siphon Tube
This let the sprayer work normally. Is there any paint in the fluid tube? If there is, look at the tip.
This are common on idle sprayers that haven’t been used for several days. When the sprayer sit unused for a few days, the paint settles and hardens in the siphon tube. Pulling the trigger sends the pump pushing against a solid plug rather then fluid.
Pressure rises and nothing come out. Remove the tube from the tip assembly. Using proper solvent/thinner, flush it thoroughly.
Prime the line by running clean fluid through until clear. This allow the pump something to push.
Inspect Hose Connections for Air Leaks
Another issue is air leaking into the fluid hose connections.
A sealed system allow Wagner sprayers to build and hold pressure. Air getting into the hose where it’s not securely attached to fittings interrupt the siphon action. The pump will labor, but it’s not moving any paint, just air.
Inspect the connection from cup to gun and all along the hose. Hand tighten. Don’t overdo it with pliers or you risk cracking plastic fitting.
A good fit ensure steady pressure.
Clean and Lubricate the Internal Valve Assembly
Last, think about the valve assembly inside. There is a valve that open and closes when you pull on the trigger.
Paint can dries there and make pulling the trigger difficult or even prevent the valve from opening. This mean taking apart the gun body. Look in your manual (for example: this is how it goes apart) for which model you have.
Use some solvent to clean the spring and valve seat. A light oil should of be used to lubricate where you see moving parts if allowed by your manual. Then put it all back together gently.
It’s a little more work, but gets it working again without replacing any thing.
Preventative Maintenance Tips for Longevity
Most Wagner Sprayers can be fixed by being clean and patient. After all, most problems with the trigger stem from lack of care after a job.
Clean it out right away. Stow it correctly. Inspect fitting before each use.
Little things like these can save you big headaches. A good sprayer is a tough tool. Take care of it, and it’ll paint for you for years.
When your hand reach for that sprayer the next time, there shouldn’t be any delay; the trigger should respond instanty.