Question about Stairmaster 4400CL Stepper

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Stairmaster 4400cl has two problems

When stepping on the steps the screen will not turn on. And then now the steps do not resist. Does these things relate to each other. It work with my son this morning. Then coming home no power and steps no resistence. The guy that sold me this never gave a charger plug, does it have a alternator... Or should it be plugged in and charged. HELP. I want to work out.

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  • Anonymous Mar 14, 2014

    I have a used Stairmaster 4400cl, and initially it worked fine. About a month later, I noticed that the right pedal has a little more resistance than the left. It doesn't seem to be getting any worse, but the difference is annoying. Any ideas?

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When I step on my 4400cl stairstepper, I get a laser gun sounding noise that continues when I get off. I get some lights blinking on the console. The only way to get the noise to stop is to unplug the back of the console. Do I need a new mother board?

Posted on Aug 23, 2009

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You need a plug to charge it. it does have a battery

Posted on Jan 27, 2009

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Why is my resistance not changing?


Replacement Parts for Fitness Exercise Equipment at SPORTSMITH

If you replaced the PCB and the alternator tests good, then the only possible components that could cause this issue would be, either wiring or the internal power board. The following link will take you to the internal power board for this unit.

Internal Power Board for Stairmaster 4600CL 4400CL SM24983 SPORTSMITH net

Feb 06, 2016 | Stairmaster Used 4600CL FreeClimber...

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Resistance Troubleshooting for 4400CL, 4600CL, and SC916 Steppers


This video covers general resistance troubleshooting for the Stairmaster 4400CL, 4600CL, and SC916 Steppers.
Tools Needed: Multi Meter, Jumper Wire
Resistance problems could be either mechanical or electrical in nature.
Mechanical problems are easily identified by noise. If a grinding noise is heard while pedaling, this is an indicator the drive hub assembly is having a problem. If a ratcheting sound is heard while pedaling, this is an indicator of a loose belt or a belt that could be coming off.
Once you've eliminated the possible mechanical causes for resistance problems, then it is time to investigate the electrical system.
The easiest test of the electrical system when investigating a resistance problem is to step onto the pedals and access Diagnostics. This is done by pressing Level ^, 6, ENTER. (DIAGNOSTICS will appear in the upper display window.) Press Level Down twice to get to the alternator test. (ALT TEST will appear in the upper display window.) Press ENTER to begin the test. As the video shows, resistance drops out when the test begins. So, if this occurs, press the Level ^ one time. This will turn the field ON. This verifies that voltage is passing from the display through the display cable to the lower control board. This confirms there is good communication between the console and the lower control board and that the voltage is being supplied to the alternator. If resistance is lost during this portion of the test, inspecting the cable should be the first step of action. Look for bent pins, loose connection or crimped wire.
Other components of the electrical system to inspect for resistance problems are the battery, load resistor, speed sensor and alternator.
We'll discuss the battery first. In order to get a proper reading, testing the battery should be done with the pedals in motion. There are 3 different battery readings a person may encounter. A reading of 6 VDC or greater indicates a good battery. A reading below 6 VDC but higher than 4.8 VDC indicates the battery needs charged for 24 hours. A reading below 4.8 VDC indicates your battery is bad and needs replaced. For more information, watch our battery testing video.
If your battery is good, the next item to check is the speed sensor. The speed sensor should be spaced a business card thickness away from the speed disc. If the speed sensor is spaced properly, the function of the speed sensor can be verified by confirming that proper voltage is present. For more speed sensor troubleshooting, watch our video on speed sensor testing and adjustment.
Next to inspect is the load resistor. Load resistor testing is pretty simple. Load resistors are ohm rated, and you want to verify the proper ohms for the load resistor being tested. Load resistors can cause the resistance to come and go. This means you may pedal a few steps and then the pedals will drop or loose resistance. Then, as the load resistor cools down a bit, you may get resistance again for a few steps. If the resistance goes back and forth like this, the load resistor likely needs replaced. For more information, see our load resistor testing video.
The last electrical component to inspect when investigating a resistance problem is the alternator. The alternator can be easily tested by performing the B+ to Field jumper test. For details on how to perform this test, watch our alternator testing video.



Resistance Troubleshooting Video for Stairmaster Stepper 4400CL 4600CL...

on Feb 25, 2015 | Stairmaster Stair Climbers

1 Answer

Stair master 4400cl Stepper making clunking sound user pedals when stepping


Why does one pedal drop on my Stairmaster Stepper but the other pedal operates correctly? Stairmaster Steppers, How to Troubleshoot when one Pedal Drops (Loses Resistance) while the Other Pedal Operates Correctly
  • If one pedal drops while the other operates correctly on your Stairmaster stepper, this problem commonly occurs when the drive sprocket on one side or the other becomes defective
  • Usually, when one drive sprocket fails, the other isn't too far behind
  • The best approach to resolve this problem is to install a new hub assembly
This can cause a clunking sound. For the replacement parts, please see the link below.

Why does one Pedal Drop on my Stairmaster Stepper

Apr 03, 2012 | Stairmaster 4400CL Stepper

1 Answer

My stairmaster 4600cl screen goes on and off when your on it is there away to test the product


Speed Sensor Testing and Adjustment for Stairmaster 4400cl and 4600cl Steppers Testing and Adjustment of Stairmaster 4600CL and 4400CL Speed Sensor Tools Needed: Volt Meter, 7/16" Wrench
A common misconception about battery powered units, it that it only requires you to step on the pedals to power the console; when in fact the speed sensor plays a major role in powering the console.
If you step on the pedals and they fall to the floor due to the console not powering up so there is no resistance, you should check the speed sensor.
The speed sensor is mounted to the alternator and reads the speed sensor disc when the unit is pedaled producing an AC voltage. The voltage from the speed sensor can be tested at the connection of the speed sensor to the lower control board. The connection is a red and black wire. Using AC setting on your volt meter at its lowest range, place the red lead to the red wire and the black lead to the black wire. Make sure the leads of the volt meter are making a good connection. Now step on the unit and verify the voltage from the speed sensor. A good speed sensor will produce about 3 VAC before the console powers up.
If the voltage is not correct, inspect the adjustment of the speed sensor. It may be necessary to adjust the sensor closer to the speed sensor disc. Proper gap of the speed sensor to the disc is about the thickness of a business card.
Retest unit after making speed sensor adjustment.


Stairmaster Stepper Speed Sensor Testing and Adjustment 4400CL and...

Feb 12, 2011 | Stairmaster 4600 Cl Cordless Freeclimber

1 Answer

Brain dead..no resistance


You first start @ the beginning by check you power source here is a web page that would give step by step procedures start with the electrical trouble shooting then work your way down the 4400 & 4600 are the same in many aspect of function.
http://www.gympart.com/index.asp?fn=/troubleshooter_bank/stairmaster/steppers/sm4400/troubleshooting

Apr 04, 2010 | Stairmaster 4400CL Freeclimber...

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