model
CMCF800C1
The CRAFTSMAN CMCF800C1 is a V20 cordless 1/4-inch impact driver kit featuring a brushed motor, variable speed trigger, and quick-release hex chuck designed for fast accessory changes.
0% Reported Successful Repair
Model details
Model number: CMCF800C1
Also known as: Craftsman, CMCF800C1
Repair manuals
Symptoms
- TRIGGER STICKS, WILL NOT RETURN, OR MOTOR KEEPS RUNNING
FM-03 TRIGGER STICKS, WILL NOT RETURN, OR MOTOR KEEPS RUNNING
- TOOL IS COMPLETELY DEAD - NO LED OR MOTOR
FM-01 TOOL IS COMPLETELY DEAD - NO LED OR MOTOR FM-09 POWER CUTS OUT WHEN THE PACK OR TOOL IS
- The release button moves poorly or the pack remains trapped on the tool rails.
The release button moves poorly or the pack remains 1. Center direction and support tool and pack so no weight binds the rails.
- The forward/reverse button will not seat, center lock-off fails, or the tool runs the wrong way.
The forward/reverse button will not seat, center lock-off 1. Release the trigger, wait for full stop, and remove the pack.
- The trigger returns and motor power ends, but the chuck repeatedly coasts much longer than normal.
The trigger returns and motor power ends, but the chuck 1. Remove the accessory, fit a charged known-good pack, and point safely.
- A charged pack is installed, but the trigger produces no worklight, motor sound, or anvil movement.
A charged battery pack is installed, but pulling the trigger produces no worklight, motor sound, or anvil movement.
- A known-straight, fully retained 1/4-in. hex bit traces a visible circle at no load.
A known-straight, fully retained 1/4-in. hex bit traces a 1. Remove the pack; inspect and clean a known-straight bit and its shank.
- A sound impact-rated 1/4-in. hex accessory will not enter fully or lock in the quick-release chuck.
A sound impact-rated 1/4-in. hex accessory will not 1. Center direction, remove the pack, and inspect the accessory shank and
- The tool starts and runs at no load, but stops abruptly on an ordinary fastener with no jam or twist.
The tool starts and runs at no load, but stops abruptly 1. Release the trigger, remove the pack, and prove the fastener is not
- With no fastener load, speed surges, has a dead band, cuts out, or ignores trigger travel.
With no fastener load, speed surges, has a dead band, 1. Remove the bit, fit a known-good pack, and make one brief no-load
- The bit rotates, but a real fastening load never produces the normal impact sound or pulses.
The bit rotates, but a real fastening load never produces 1. Fit a charged known-good pack and the correct impact-rated accessory.
- Bright repeated arcing or sharp crackling is visible at the rear vents while the tool runs.
Bright repeated arcing or sharp crackling is visible at the 1. Release the trigger, remove the pack, and let the motor area cool.
Failure Modes
- FM-22: DRIVING OUTPUT IS LOW DESPITE STEADY ROTATION AND IMPACT
FM-22 DRIVING OUTPUT IS LOW DESPITE STEADY ROTATION AND IMPACT
- FM-23: FASTENER CAMS OUT, STRIPS, SNAPS, OR IS OVERDRIVEN
FM-23 FASTENER CAMS OUT, STRIPS, SNAPS, OR IS OVERDRIVEN
- FM-29: HOUSING, HANDLE, RAILS, NOSE, VENTS, OR HOOK MOUNT IS DAMAGED
FM-29 HOUSING, HANDLE, RAILS, NOSE, VENTS, OR HOOK MOUNT IS DAMAGED
- FM-15: A CORRECT 1/4-IN. HEX BIT WILL NOT INSERT OR LOCK
FM-15 A CORRECT 1/4-IN. HEX BIT WILL NOT INSERT OR LOCK
- FM-09: POWER CUTS OUT WHEN THE PACK OR TOOL IS MOVED
FM-09 POWER CUTS OUT WHEN THE PACK OR TOOL IS MOVED
- FM-25: FM-25 TOOL SHUTS OFF UNDER LOAD WITHOUT A MECHANICAL BIND
FM-25 TOOL SHUTS OFF UNDER LOAD WITHOUT A MECHANICAL BIND
- FM-01: FM-01 TOOL IS COMPLETELY DEAD - NO LED OR MOTOR
The tool is completely dead with no LED or motor response despite a charged battery pack being installed.
- FM-13: WORKLIGHT STAYS ON FAR BEYOND THE NORMAL AFTERGLOW
FM-13 WORKLIGHT STAYS ON FAR BEYOND THE NORMAL AFTERGLOW
- FM-03: TRIGGER STICKS, WILL NOT RETURN, OR MOTOR KEEPS RUNNING
FM-03 TRIGGER STICKS, WILL NOT RETURN, OR MOTOR KEEPS RUNNING
- FM-27: FM-27 TOOL OR PACK OVERHEATS, OR HEAT SHUTDOWN REPEATS
FM-27 TOOL OR PACK OVERHEATS, OR HEAT SHUTDOWN REPEATS
- FM-24: BIT OR FASTENER BINDS, TOOL STALLS, TWISTS, OR STAYS STUCK
FM-24 BIT OR FASTENER BINDS, TOOL STALLS, TWISTS, OR STAYS STUCK
- FM-02: WORKLIGHT COMES ON, BUT THE MOTOR WILL NOT START
FM-02 WORKLIGHT COMES ON, BUT THE MOTOR WILL NOT START
Related troubleshooting
Common symptoms
- TRIGGER STICKS, WILL NOT RETURN, OR MOTOR KEEPS RUNNING
- TOOL IS COMPLETELY DEAD - NO LED OR MOTOR
- The release button moves poorly or the pack remains trapped on the tool rails.
- The forward/reverse button will not seat, center lock-off fails, or the tool runs the wrong way.
- The trigger returns and motor power ends, but the chuck repeatedly coasts much longer than normal.
- A charged pack is installed, but the trigger produces no worklight, motor sound, or anvil movement.
- A known-straight, fully retained 1/4-in. hex bit traces a visible circle at no load.
- A sound impact-rated 1/4-in. hex accessory will not enter fully or lock in the quick-release chuck.
- The tool starts and runs at no load, but stops abruptly on an ordinary fastener with no jam or twist.
- With no fastener load, speed surges, has a dead band, cuts out, or ignores trigger travel.