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Michael KelleyAug 11, 2025
What to do if Graco IPH-25 shows E53 error?
- EejacobsonAug 11, 2025
If the Graco Controller displays error E53, it means a piston stroke has taken more than 10 seconds. First, make sure the gun safety is off and the gun dispense valve isn't stuck closed. Check that the machine has enough hydraulic or pneumatic pressure. Look for anything that might be mechanically interfering with the piston and confirm the correct power supply to the proportioner piston.