Most problems with Furitek ESCs, motors and radios come down to a few common causes: battery voltage, wiring, firmware or radio settings. Find your symptom below and try the fix before contacting us. Still stuck? Email us at sales@furitek.com and we'll help.
Jump to: FuriCar app & firmware Β· Power & battery Β· Radio, receiver & calibration Β· Motor, gears & drivetrain Β· Heat Β· Vehicle-specific
Before you start: 4 quick checks
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Battery: make sure your LiPo is fully charged. Many problems are just low voltage.
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Wiring: unplug and re-plug the power, receiver and Bluetooth/wireless module plugs. Check the ports for bent pins.
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App and firmware: update the FuriCar app and your ESC firmware to the latest version.
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Radio: set throttle trim, end points and rates to neutral/default, then recalibrate the ESC.
FuriCar app & firmware
| Problem |
Likely cause |
Fix |
| ESC won't connect to the app |
Loose wireless/Bluetooth module plug |
Make sure the module is firmly plugged into the ESC's module port. Check the port for bent pins. |
| App doesn't show the car icon |
Old app version, or location turned off on your phone |
Update to the latest FuriCar app, and turn on location services on your phone. |
| App settings won't save |
Old app version |
Uninstall the app and install the latest version. |
| Python PRO won't connect to the app |
Old app or firmware |
Uninstall and reinstall the latest FuriCar app, then update the ESC firmware. |
| ESC shut down during a firmware update |
ESC went into bootloader mode, low battery or weak connection |
Use a fully charged battery and a strong, stable phone connection. The ESC can still connect to the app in bootloader mode, so reconnect and run the update again. |
| ESC or Avatar TX shows no sign of life (bootloader mode) |
Interrupted firmware update |
Use a charged battery, open the app and connect. The app will let you select and reinstall the firmware. |
Power & battery
| Problem |
Likely cause |
Fix |
| Sudden loss of power |
Loose or disconnected power lead |
Check that the power cable is fully seated in the ESC power port. |
| Steering works but no throttle |
Low battery voltage |
Charge or replace the battery. |
| Car stops after a few minutes even though the battery still has charge |
Low-voltage cutoff set too high |
In the app, find the voltage cutoff setting and set it correctly for your battery. The value is per cell. |
| Lizard PRO has no power after a few weeks / random shutdowns |
Power plug not fully inserted |
Unplug the power cable and plug it back in carefully. If there's still no response, connect in the app and update to the latest firmware with a charged battery. |
| Cedar + Python random shutdown |
Old firmware or wrong motor selected |
Update to the latest firmware and select Cedar in the motor selection box. |
Radio, receiver & calibration
| Problem |
Likely cause |
Fix |
| Steering works but no throttle after installing a Furitek ESC |
Stock receiver not compatible with aftermarket ESCs |
On the SCX24 V2, FMS FCX24, Traxxas TRX-4M and Axial UTB18, the stock receiver does not work with aftermarket ESCs. Use a separate 3β4 channel TX/RX. On SCX24 and SCX30 with a stock Axial SLT2 transmitter, you can use the Furitek Micro SLT2 Receiver with supported Furitek ESCs. |
| Reverse is much faster than forward |
ESC calibration is off |
Recalibrate the ESC. Watch the calibration video. |
| ESC calibration fails |
Radio end points, rates or trims not at neutral |
Reset all throttle settings on your radio to zero/neutral, then calibrate again. |
| Wrong steering direction in the app |
Direction set wrong |
In the app, open the rotor direction setting and switch between CW and CCW. |
| ESC doesn't recognize the receiver |
Loose plug or bent pin |
Unplug the receiver lead, inspect the ESC port for bent pins and plug it back in. |
| Avatar receiver has no light |
Lead reversed or loose |
Check the ESC lead is plugged in the right way round. If everything is correct, contact us. |
| Avatar V2 RX won't bind (LED blinks fast for 1β2 seconds only) |
Wi-Fi interference |
Bind again away from your Wi-Fi router. |
| FMS FCX24 radio won't bind |
Binding procedure |
Watch the FCX24 binding video. |
Motor, gears & drivetrain
| Problem |
Likely cause |
Fix |
| Truck cogs or stutters under load |
Gear mesh too tight or too loose, wheels too tight, or binding in the driveline |
Set the gear mesh correctly (gear mesh video), check wheel nuts aren't over-tightened, and check the driveline turns freely. |
| Motor spins up wrongly after install |
Wrong motor type in the app |
Set motor type to Brushless for brushless motors and Brushed for brushed motors. |
| Micro Komodo pinion comes loose |
Gear mesh set wrong |
Reset the gear mesh. Fix the pinion with a small amount of heavy-duty CA glue on the motor shaft and let it dry 30 minutes before running. |
| Motor stops randomly while steering still works (Lizard PRO + Micro Komodo on AX24) |
Motor touching the frame and binding |
Check clearance around the motor. Trim the frame if needed so the motor doesn't touch it. |
| Motor is hard to turn by hand when removed from the transmission |
Possible motor defect or a disconnected phase wire |
Email us at sales@furitek.com. |
| Lizard Ultimate + Komodo 2208 cogs badly |
Not a compatible pair |
The Komodo 2208 for UTB18 only works with the Python UTB18 ESC. |
Heat
| Problem |
Likely cause |
Fix |
| Motor gets hot while idling |
Drag brake set too high |
In the app, lower the drag brake to about 30. If it's still hot, lower it further step by step. |
| ESC gets very hot |
ESC touching a conductive surface (especially carbon fiber) |
Insulate the ESC with heat-shrink and mount it with adhesive tape so it doesn't touch carbon or metal. |
| Servo gets hot or stutters |
Servo output voltage set wrong in the app |
Set the servo output voltage in the app to match your servo's specs. |
| Python UTB18 + Komodo 2208 running hot |
Old firmware |
Update to the latest firmware. |
Vehicle-specific
| Problem |
Likely cause |
Fix |
| Cayman Pro cogs |
Loose differential gear |
With a 1.5 mm hex driver, open the axle diff cover and carefully tighten the diff gear screw. Don't over-tighten or you'll damage the gears. |
| Cayman Pro steering angle is limited |
End points |
Hold the steering wheel fully to one side, then press the steering trim button. |
| Cayman: no steering or throttle, radio LED blinking |
Low transmitter battery |
Replace the transmitter batteries. |
| TRX-4M with Stinger cogs under load |
Gearing too tall |
After updating firmware, setting punch correctly and checking for binding, fit lower reduction gearing (Traxxas part 9776R). |
Still need help?
Email us at sales@furitek.com. Please include your order number, the product and vehicle, your app/firmware version and a short video of the problem. You can also browse our Tutorial Videos and Guides & Build Tips.
