User Manual
73
EN
Problem Possible Cause Solution
Short Run Time • Battery damaged/not charged
• Motor dirty
• Check/change battery
• Check/clean
Sluggish Action • Motor dirty
•  Bind in drivetrain
•  Vehicle battery is not charged
• Check/clean
• Clean/adjust
• Replace/recharge
Controls Reversed •  ST. REV or TH. REV •  Change switch position
Motor/ESC overheat •  Over-geared for the driving environment •  Install smaller pinion on the motor
Does Not Operate • Transmitter batteries low
•  Transmitter powered off
•  ESC powered off
•  Vehicle battery is not charged
•  Dual-rate (D/R) steering and/or throttle knobs on 
transmitter are turned to zero
• Replace/recharge
• Power on
• Power on
• Replace/recharge
•  Adjust dual-rate (D/R) steering and/or throttle knobs to 10
Poor Range •  Transmitter batteries low
•  Receiver antenna damaged
• Replace/recharge
• Check/repair/replace
The system will not connect •  Transmitter and receiver too near each other
•  Transmitter and receiver too near large metal 
objects (vehicles, etc.)
•  Throttle trim out of center on 
transmitter
•  Receiver accidentally put in bind mode so 
receiver is no longer bound
•  Move transmitter 3.3–9.8ft (1–3m) from receiver
•  Move away from large metal objects 
(vehicles, etc.)
•  Set throttle trim on transmitter to zero. Turn off and on 
transmitter and vehicle
•  Rebind transmitter and receiver
The receiver goes into failsafe 
mode a short distance away from 
the transmitter
•  Check the receiver antenna to be sure it is not cut 
or damaged
•  Make sure the antenna is in the antenna tube
•  Contact Horizon Product Support
The receiver quits responding 
during operation
•  Low battery voltage
•  Loose or damaged wires or connectors between 
battery and receiver
•  Completely recharge battery
•  Do a check of the wires and connection between battery 
and receiver. Repair or replace wires and/or connectors
Receiver and transmitter are not 
bound
•  Transmitter accidentally put in bind mode, ending 
bind to receiver
•  Bind transmitter to receiver
Vehicle moves forward or 
backward without input from user
•  Throttle trim on transmitter not centered •  Adjust throttle trim to set neutral point
Car does not drive straight •  Steering trim on transmitter not centered •  Adjust steering trim so vehicle drives straight
No steering or lack of steering  • Steering dual-rate (D/R) not adjusted 
correctly
• Servo failed
•  Adjusts steering dual-rate (D/R) knob on transmitter to 
desired steering throw
•  Contact Horizon Product Support
No throttle or lack of throttle • Throttle dual-rate (D/R) not adjusted 
correctly
• ESC failed
• Motor failed
•  Adjust the throttle dual-rate (D/R) knob on transmitter to 
desired steering throw
•  Contact Horizon Product Support
•  Contact Horizon Product Support
Clicking noise in transmission area •  Dirt or rocks in spur gear
•  Motor moved away from spur gear
•  Remove gear cover and inspect. If necessary, replace gear
•  Reset gear mesh
TROUBLESHOOTING GUIDE










