There are few things more frustrating than lacing up your shoes, stepping onto your Bowflex, and being greeted by a screeching beep and a flashing "E1" or "E2" code. Before you call a technician, it helps to understand what the machine is trying to tell you.
Deciphering the Codes
In the Bowflex ecosystem (and many Nautilus-manufactured machines), these codes generally point to the Speed Control System.
- E1 (Speed Sensor Signal Missing): The console told the motor to move, but it isn't receiving a signal back indicating movement. This usually means the belt starts for a few seconds and stops, or doesn't move at all.
- E2 (Over Speed / Motor Control): The system detected the belt moving faster than requested, or there is a communication breakdown between the console and the lower motor control board.
Step 1: The Friction Test (Most Common Cause)
Surprisingly, an E1 error is often caused by a lack of lubrication. If the walking belt is dry, the friction creates excessive load. The motor tries to push, detects high amperage draw, and the controller cuts power to protect itself, triggering the error.
The Fix:
- Slide your hand under the belt. It should feel slightly oily or waxy.
- If it is dry, apply 100% silicone treadmill lubricant.
- Walk on the machine at a slow speed (1 mph) to distribute the lube, then restart the power.
Step 2: The Reed Switch and Magnet
If lubrication isn't the issue, the problem is likely hardware alignment. Bowflex treadmills use a magnetic sensor (reed switch) to count how fast the front roller is spinning.
The Fix:
- Unplug the treadmill. (Crucial safety step).
- Remove the motor hood cover (usually held on by Phillips screws).
- Locate the front roller pulley (the big wheel connected to the motor via a drive belt).
- Find the small magnet glued to the pulley and the sensor aimed at it.
- Check Alignment: The sensor tip should be within 1/8" to 1/4" of the magnet. If the vibration has shaken it loose, gently bend the bracket back so the sensor is close to the magnet without touching it.
- Spin the wheel by hand. If you hear a faint ticking from the sensor as the magnet passes, it is likely working.
Step 3: Power Cycle and Calibration
Sometimes the digital brain just needs a reset.
- Unplug the machine for 60 seconds.
- Plug it back in.
- Depending on your specific Bowflex model (T10, T22, BXT116, etc.), there is a button combination to enter "Calibration Mode" (often holding 'Pause' and 'Enter' or 'Incline Down' and 'Start'). Consult your manual for the exact key press.
- Run the calibration. This forces the machine to relearn the speed sensor limits.
Is Your Motor Control Board Fried?
If you have lubricated the belt, aligned the sensor, checked all wire harnesses for loose connections, and the E1/E2 code persists, you may be looking at a failed Lower Control Board (MCB) or a worn-out motor. Replacement parts for out-of-warranty Bowflex machines can range from $300 to $600.
If your machine is aging, it might be more cost-effective to upgrade to a newer model rather than sinking money into electronics repairs. Below are the current top replacements for Bowflex owners.
The Direct Replacement: Bowflex Treadmill 22
If you are invested in the JRNY ecosystem and want to stick with the brand, the Treadmill 22 is their current flagship. It solves many of the sensor reliability issues of previous generations with updated heavy-duty hardware.
The "Tank" Alternative: Sole F85
If you want to avoid electronic glitches in the future, we recommend the Sole F85. It is famous in the industry for having fewer sensors and proprietary lockouts, relying instead on high-torque motors and a simple, bombproof Z-frame design.
The Performance Alternative: Horizon 7.8 AT
For those who experienced E1/E2 errors during rapid interval changes (HIIT), the Horizon 7.8 AT is the best pivot. Its RapidSync motor technology changes speeds faster than the Bowflex, and it uses a highly responsive dial system that is less prone to digital communication errors.
