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treadmilltech, Technician
Category: Exercise Equipment
Satisfied Customers: 5645
Experience:  20+ years experience repairing exercise equipment with emphasis on Nordictrack/Proform and Horizon
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Hi, I have a nordictrack audiostrider 990 that was working

Resolved Question:

Hi, I have a nordictrack audiostrider 990 that was working just fine until a few weeks ago when it didn't immediately turn on when starting to exercise. Now it doesn't turn on at all making it impossible to adjust the height or resistance level nor to monitor the distance/calories etc. I believe the problem is with the sensor. How do I fix this.
Submitted: 7 years ago.
Category: Exercise Equipment
Expert:  treadmilltech replied 7 years ago.
The sensor needs to be within a credit cards width of the magnet on the flywheel. Make sure the magnet has not fallen off. You can test the sensor with a meter by seeing if it opens and closes when the magnet passes by. If it does not replace it , purchase at , if it does then replace the console. You can purchase a console from the same site or eBay.
Customer: replied 7 years ago.
Thanks for the quick reply but I think I need a more dumbed down version.

1. Where is the sensor and how do I get to it?
2. You say I can test the sensor with a meter. What meter? and what do you mean by opens and closes? I thought it was electronic?
3. What is the console?
4. If it is broken, is there a way to bypass the sensor so that the machine is always on when plugged in in order to be able to switch resistance levels and heights? I realize I wont get calorie counts and such, but being able to control resistance is more important.
Expert:  treadmilltech replied 7 years ago.
1. Remove the side shields and the sensor is a small cylinder mounted close to the flywheel and when the flywheel spins the sensor has internal parts that react to the magnet mounted to the flywheel.
2. You would need a multi meter(ohm meter) and if you unplug the sensor there are two wires you can place the meter leads on and if you spin the flywheel, when the magnet passes the sensor it will cause the needle on the meter to jump or if the meter is digital it will give a reading.
3. The console is the display panel
4. I have never tried to bypass the sensor before so I am not sure how that would work. If you wanted to try it, unplug the sensor and put a piece of wire into the plug to connect the wires. If it doesn't work it is because the console may require a pulsing signal from the sensor to function. It may work though, let me know.

I do want to let you know the sensor is very inexpensive to replace.

Edited by treadmilltech on 9/23/2010 at 1:04 AM EST
Customer: replied 7 years ago.
Hi, I opened up the side panels and found the fly wheel with the magnet still attached. However I don't really know where the sensor is. It is kind of a tight spot and there is a whole mess of wires. Do you have a schematic to identify the sensor or at least what color wires are running to it? What is the proper way of adjusting it so as not to break it?
Expert:  treadmilltech replied 7 years ago.
It is mounted right below the tension motor, which is mounted to the eddy mech assy. Here is a link to a blow up diagram of your unit look at part #50.

just copy and paste the whole http address into your browser and then hit exploded diagram and it will download.

Just loosen the screw that holds the sensor and slide it into proper position or replace if needed and the sensor can be ordered from the same site.
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