my ryobi one+ hp impact driver just makes a clicking noise when i pull the trigger, won’t spin at all.

Diagnosis

The rhythmic clicking noise you hear when pulling the trigger on the Ryobi ONE+ HP Brushless Impact Driver (PBIW01B) is typically not a mechanical failure of the impact hammer, but rather an electronic "stutter" caused by a failure in the trigger switch assembly or the electronic brake system. In this specific brushless model, the trigger sends a variable voltage signal to the controller. If the internal contacts of the switch are pitted or the electronic brake is stuck in the "engaged" position, the motor receives a momentary pulse of power that is immediately cut off, resulting in a rapid clicking sound rather than a smooth rotation. To confirm this is the issue, check the LED light on the base of the handle. If the light flickers in synchronization with the clicking sound, the tool is experiencing a power interruption at the switch level. If the light stays solid but the motor only clicks, the issue may lie deeper in the brushless controller board. However, in 90% of PBIW01B cases, the culprit is the trigger switch assembly which has failed to transition from the braking state to the drive state.

How to Fix It

To resolve this, you must replace the trigger and switch module. While some attempt to clean the contacts, the high current of the HP brushless line usually burns through the internal traces, making a full replacement the only permanent solution. You will need replacement part #RY221013 (or the compatible HP brushless switch assembly).

1. Remove the 4.0Ah or 6.0Ah battery pack entirely to ensure there is no residual current in the capacitors.
2. Using a T15 Torx driver, remove the long housing screws located on the side and bottom of the tool casing. Note that some screws may be recessed deep into the plastic molding.
3. Carefully pry the two clamshell halves of the housing apart. Be cautious not to snap the plastic alignment tabs. Once open, lay the tool on its side so the internal components are visible.
4. Locate the trigger switch assembly. You will see two sets of wires (typically red and black) connecting the switch to the brushless controller board.
5. Carefully unplug the wiring harness from the old switch. If the wires are soldered, use a soldering iron to desolder the connections.
6. Unscrew the small retaining screws holding the switch module to the handle frame and lift the old assembly out.
7. Insert the new switch assembly (Part #RY221013), ensuring the trigger is seated fully against the outer housing to prevent "dead zones" where the trigger doesn't engage.
8. Reconnect the wiring harness, ensuring the connectors click firmly into place.
9. Reassemble the housing, tighten the T15 screws (do not over-torque as the plastic strips easily), and slide in a fully charged battery to test the trigger response.

If That Didn't Work

• Check the Battery Terminals: Inspect the metal contact plates inside the battery bay. If there is carbon buildup or debris, the tool may be experiencing a "brown-out" where it has enough power to click the relay but not enough to spin the motor. Clean the contacts with a cotton swab dipped in 90% isopropyl alcohol.
• Inspect the Brushless Controller Board: If the new switch doesn't fix it, look for "burnt" spots or swollen capacitors on the main PCB. If the MOSFETs on the board have blown, the tool will click as it attempts to send power to the motor phases but fails. In this case, the entire electronic board must be replaced.
• Check for Mechanical Jamming: Remove the chuck/collet and check if the internal anvil is seized. If a piece of debris has entered the hammer mechanism, the motor may be attempting to turn but is physically blocked, triggering the electronic overload protection (which sounds like a click). Use compressed air to blow out the front end of the tool.
• Test with a High-Output Battery: Try a High-Demand 18V battery. Some older or degraded batteries cannot provide the initial "inrush" current required by the HP brushless motor, causing the controller to trip and reset repeatedly.

Heads Up

• Avoid Over-Tightening: The PBIW01B housing is made of high-impact plastic, but the screw bosses are prone to stripping. Tighten screws until snug, but do not force them.
• Static Warning: When handling the brushless controller board, touch a grounded metal object first. Static discharge can easily fry the sensitive logic gates on the HP series boards.
• Lubrication: While you have the tool open, apply a small amount of lithium grease to the hammer spring and anvil area to extend the life of the impact mechanism.
• Battery Heat: If the tool ever stops working and clicks during heavy use, let the battery cool down for 10 minutes. The HP series has a thermal cutoff that can mimic a switch failure.