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Stairmaster 4600 CL Full Resistance all the time,

Stairmaster 4600 CL Full Resistance all the time even when changed on the console, checked all connections, voltages, ohmed resister, ohmed cable from console to board?

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Posted on Jan 02, 2017

  • 49 Answers

SOURCE: Freeclimber 4600 CL full resistance

Check all connections and make sure all wires are not broken or smashed. Replace lwr cntrl board.

Posted on Sep 01, 2009

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SOURCE: stairmaster 4000 crazy console

Check all connections from power source in inside the cover where alternator is to upper display then if the problem still continues I suspect your upper console is going south. Call National Gym Supply @ 1-800-496-7278 they can either repair it or may have a exchange board for you.

Posted on Mar 13, 2010

Marco Darko
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SOURCE: Stairmaster 4000pt pedals lose resistance during workout

places to check.

Posted on Jul 26, 2010

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There is no change in resistance when programmed at console

Replacement Parts for Fitness Exercise Equipment at SPORTSMITH

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...

Sep 09, 2015 | Stairmaster 4600 Cl Cordless Freeclimber

1 Answer

4200pt no resistance on the pedals

This can be a resistance motor or belt or console

Oct 02, 2012 | Stairmaster 4600 Cl Cordless Freeclimber

1 Answer

I have a 4400CL. Everything seems to be working but when I start a program and change the level button the resistance of the padels stays full or hard all the time. What can be the problem?

I had the same problem. It turned out to be the lower control board. It is easy to replace and you can order it online. I payed about $65.00 after returning the old board.

Oct 28, 2011 | Stairmaster 4600 Cl Cordless Freeclimber

1 Answer

There is no pedal resistance is battery needed to be changed? where is the battery located or what is the problem w/ the equipment???

if console is on it is not battery problem
it is alternator or MCB board

it is usual for these units MCB fails

Nov 25, 2010 | Stairmaster 4600 Cl Cordless Freeclimber

1 Answer

I have full resistance all the time what can I do to solve the problem?

yes it happens when one of the cables from tension coil dissplaced or alternator controller is bad
check it for all loose wires and check bettery and alternator controller if heats up
call me 347 515 8670 for controller needed

Nov 19, 2010 | Stairmaster 4600 Cl Cordless Freeclimber

2 Answers

Looking for a manual for stairmaster 4600 free

Hi, I just purchased a used StairMaster 4600CL last week, and found a link for an owner's manual that covers the StairMaster FreeClimber 4200 PT, 4400 PT/CL, and 4600 PT/CL. This is a free, .pdf download:


Jan 23, 2010 | Stairmaster 4600 Cl Cordless Freeclimber

1 Answer

Stairmaster climber model 4600 pt pedals go all

Unplug dc power connection then remove right side panel check for loose connections on on alternator, check distance of speed sensor to speed sensor disc you should no more than 3 credit card distance between them. Next remove the black wire from the B+ terminal on the alternator, then remove the brown wire from the field terminal on the alternator.Place a short wire with alligator clips between B+ and field terminals start stepping for about 10 to 15 second you should full resistance in that case its the upper console that if not replace alternator

Jan 23, 2010 | Stairmaster Exercise & Fitness

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