Question about Precor 9.21 Treadmill

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I have a 10 year old Precor 9.25 i which stops while I am running. I have had a new dedicated circuit installed, flipped the deck and replaced the belt. Each worked briefly. I can walk and not have it turn off, but run only 3/4 mile and it's off. What is the next move before replacement? Thanks

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4 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: I have a Spirit SR-918

We also have a Spirit SR 918. It may be the lower or upper boards powering the motor that malfunctioned.

We need a particular part replaced on it, other than those boards, so if you still have not trashed the unit, have replaced it, or are thinking about disposing of the unit, we will pick it up. We are in Chicago, as well.

It will cost us between $125 to $499 to replace our treadmill, but it is so heavy duty, that it comes down to finding the parts, since additional labor will come out even.

Posted on Dec 31, 2010

ercupa190
  • 12223 Answers

SOURCE: cateye ect 220 deck replace or reverse

Dear Sir:

I will try to help you.

Please see the videos with patience and carefully:

You must need basic tools and include Dvom(DigitalVoltemeter)
http://www.youtube.com/watch?v=AZSMLpXm-tA&feature=related
http://www.youtube.com/watch?NR=1&v=USSgbsZbDLQ

http://www.youtube.com/watch?v=hKbAqvuOBS0&feature=related

http://www.youtube.com/watch?v=-oeXTKqWECw&feature=related
http://www.youtube.com/watch?v=GPI6dFJCUA4
http://www.youtube.com/watch?v=GdlAxZHLDys&feature=related

With this you will fix it.

If you need further assistance, please reach me.

sincerely. God bless you.

E.CUADRA
MANAGUA, NICARAGUA.

Posted on Oct 21, 2011

ercupa190
  • 12223 Answers

SOURCE: 9.21 and house circuit

You have strong short circuit in your treadmill machine.Please check the videos carefully using the Dvom instructions attached.

Watch this videos tips:
http://www.youtube.com/watch?v=qgb2TY3WCkg&feature=related
http://www.youtube.com/watch?v=-oeXTKqWECw&feature=related
http://www.youtube.com/watch?v=GPI6dFJCUA4
http://www.youtube.com/watch?v=bF3OyQ3HwfU&feature=related
http://www.fixya.com/support/r10724803-measure_voltage_in_transforme_fitness
http://www.fixya.com/support/r10786838-test_procedure_dc_motor

Test the power cord+some cable making ground+finally the main motor (shorted or grounding) +Transformer(shorter+grounding).Repair using the Dvom

Posted on Nov 13, 2011

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1 Answer

Treadmill keeps stoping


Precor Error 27, Too Much Drive Motor Current Probable Cause 1. The running belt and/or deck are badly worn.
2. Drive motor is shorted or de-magnetized causing a high power demand.
Corrective Action
  1. Check the amp draw using a clamp on AC volt-amp meter during loaded and no load conditions and compare values to a similar treadmill that is known to have a good running belt and deck. Replace the belt and/or deck if necessary. Don't forget, some units have a double sided deck which means it may be flipped over rather than replaced if it has an unused side.
  2. Test unit with a known good drive motor. Replace drive motor if necessary.
Precor Error Code 27

Jan 27, 2014 | Life Fitness Treadmill Precor C954 (Used)

1 Answer

My treadmill stops wen runing on it and brings up er 27 on screen


Precor Error 27, Too Much Drive Motor Current Probable Cause 1. The running belt and/or deck are badly worn.
2. Drive motor is shorted or de-magnetized causing a high power demand.
Corrective Action
  1. Check the amp draw using a clamp on AC volt-amp meter during loaded and no load conditions and compare values to a similar treadmill that is known to have a good running belt and deck. Replace the belt and/or deck if necessary. Don't forget, some units have a double sided deck which means it may be flipped over rather than replaced if it has an unused side.
  2. Test unit with a known good drive motor. Replace drive motor if necessary.

Precor Error Code 27

Jan 27, 2014 | Life Fitness Treadmill Precor C954 (Used)

1 Answer

My treadmill stops wen runing and brings up er 27 on screen


Precor Error 27, Too Much Drive Motor Current Probable Cause 1. The running belt and/or deck are badly worn.
2. Drive motor is shorted or de-magnetized causing a high power demand.
Corrective Action
  1. Check the amp draw using a clamp on AC volt-amp meter during loaded and no load conditions and compare values to a similar treadmill that is known to have a good running belt and deck. Replace the belt and/or deck if necessary. Don't forget, some units have a double sided deck which means it may be flipped over rather than replaced if it has an unused side.
  2. Test unit with a known good drive motor. Replace drive motor if necessary.

Precor Error Code 27

Jan 27, 2014 | Life Fitness Treadmill Precor C954 (Used)

1 Answer

Precor Treadmill C956 error 21


Precor Error Code 21 Error Code: 21 Manufacturer: Precor
Model: All Models
Error Description: Error 21, Too many Consecutive Power Requests- The error 21 observes a treadmill's power bit reading when the treadmill was operating at speeds above 1 mph. Power bits indicate the relative time that the motor controller drive circuit is turned on. Power bits is an indication of the amount of power the load is demanding from the motor controller. Error 21 indicates that at a speed greater than 1 mph, an excessive amount of power is being demanded from the motor controller. Possible Reason:
  1. A badly worn deck and/or running belt can cause the error to appear when the unit is in use.
  2. Badly worn drive motor brushes may not be making proper contact with the drive motor commutator causing the error to occur when the unit is in use. The unit may also slow down or become sluggish when the load or speed is increased.
  3. A jumper may be required on the lower PCA if installed into a 120 VAC (Version 2) treadmill.
  4. A leaky or shorted drive motor filter capacitor (on units equipped with SCR motor controller) could increase the current demand enough to cause the error.
  5. A leaky or shorted drive motor inductor (on units equipped with SCR motor controller) could increase the current demand enough to cause the error.
  6. The high power demand is caused by a shorted or de-magnetized drive motor.
Recommended Action:
  1. Determine the amount of AC input current being drawn by the unit under no load and loaded conditions using a clamp on AC ammeter. The current displayed can be used to determine the condition of the deck and/or running belt. These same readings should be taken on a like unit, in good operating condition with a know good deck and running belt. The readings from the unit in good operationg condition can be used as the benchmark. Compare readings and replace* the deck and/or running belt if necessary. *Some units have a reversible deck. Be sure if the deck is being flipped or replaced, a new belt is installed on the new deck surface.*
  2. Inspect and repalce both drive motor brushes if necessary.
  3. Inspect the lower PCA (if unit is 120 VAC/ Version 2) for jumper. If jumper is not installed, error typically appears between 7 mph & 8 mph. Install jumper if necessary. CAUTION - DO NOT install jumper if unit is 240 VAC. Installing the jumper on a 240 VAC unit will casue the lower PCA to fail.
  4. Measure the AC input current without a load using a clamp on AC ammeter. Electrically isolate the filter capacitor from the drive motor circuit. The drive motor leads need be kept intact so the drive motor will operate with the filter capacitor removed from the circuit. Re-measure the no load AC input. If the AC input current is significantly lower, replace the filter capacitor.
  5. Measure the AC input current without a load using a clamp on AC ammeter. Electrically isolate the inductor from the drive motor circuit. The drive motor leads need be kept intact so the drive motor will operate with the inductor removed from the circuit. Re-measure the no load AC input. If the AC input current is significantly lower, replace the inductor.
  6. Swap the existing drive motor with a known good drive motor.
Precor Error Code 21

Dec 08, 2013 | Precor C956 Treadmill with Cardio Theater...

1 Answer

Hello, Our Precor 9.21si begins slipping after walking or running a few minutes. Seems to be worse the faster you go. After about 1 mile, the house fuse blows. What troubleshooting steps do you thi


This really sounds like the results of long term use without lubrication or wax between the belt and deck. Chances are you will need to replace the running belt and the deck or flip the deck if it has not already been done. The friction builds up between the deck and belt and caused the electronic components to overheat. The machine is shutting down as a precautionary measure. It will do this only so many times before the electronics are zapped. Start with the deck and belt. Hopefully the electronics are okay. With your model and serial number, you can visit our website and view the products we have available for your particular machine.
Precor Repair Parts for 9 21s 9 21si Treadmills Consumer SPORTSMITH net

Feb 03, 2013 | Precor Treadmill 9.21 9.21s 9.25 9.21si...

1 Answer

Precor 9.21s. Get ERR 21 message. Stopped Working


Precor Error Code 21 Error Code: 21 Manufacturer: Precor
Model: All Models
Error Description: Error 21, Too many Consecutive Power Requests- The error 21 observes a treadmill's power bit reading when the treadmill was operating at speeds above 1 mph. Power bits indicate the relative time that the motor controller drive circuit is turned on. Power bits is an indication of the amount of power the load is demanding from the motor controller. Error 21 indicates that at a speed greater than 1 mph, an excessive amount of power is being demanded from the motor controller. Possible Reason:
  1. A badly worn deck and/or running belt can cause the error to appear when the unit is in use.
  2. Badly worn drive motor brushes may not be making proper contact with the drive motor commutator causing the error to occur when the unit is in use. The unit may also slow down or become sluggish when the load or speed is increased.
  3. A jumper may be required on the lower PCA if installed into a 120 VAC (Version 2) treadmill.
  4. A leaky or shorted drive motor filter capacitor (on units equipped with SCR motor controller) could increase the current demand enough to cause the error.
  5. A leaky or shorted drive motor inductor (on units equipped with SCR motor controller) could increase the current demand enough to cause the error.
  6. The high power demand is caused by a shorted or de-magnetized drive motor.
Recommended Action:
  1. Determine the amount of AC input current being drawn by the unit under no load and loaded conditions using a clamp on AC ammeter. The current displayed can be used to determine the condition of the deck and/or running belt. These same readings should be taken on a like unit, in good operating condition with a know good deck and running belt. The readings from the unit in good operationg condition can be used as the benchmark. Compare readings and replace* the deck and/or running belt if necessary. *Some units have a reversible deck. Be sure if the deck is being flipped or replaced, a new belt is installed on the new deck surface.*
  2. Inspect and repalce both drive motor brushes if necessary.
  3. Inspect the lower PCA (if unit is 120 VAC/ Version 2) for jumper. If jumper is not installed, error typically appears between 7 mph & 8 mph. Install jumper if necessary. CAUTION - DO NOT install jumper if unit is 240 VAC. Installing the jumper on a 240 VAC unit will casue the lower PCA to fail.
  4. Measure the AC input current without a load using a clamp on AC ammeter. Electrically isolate the filter capacitor from the drive motor circuit. The drive motor leads need be kept intact so the drive motor will operate with the filter capacitor removed from the circuit. Re-measure the no load AC input. If the AC input current is significantly lower, replace the filter capacitor.
  5. Measure the AC input current without a load using a clamp on AC ammeter. Electrically isolate the inductor from the drive motor circuit. The drive motor leads need be kept intact so the drive motor will operate with the inductor removed from the circuit. Re-measure the no load AC input. If the AC input current is significantly lower, replace the inductor.
  6. Swap the existing drive motor with a known good drive motor.
Precor Error Code 21

Nov 03, 2012 | Precor 9.21 Treadmill

2 Answers

After walking for 10 minutes or so, or even sooner when I am jogging, the 921 loses power and trip my house circuit breaker. What needs to be replaced? Guessing it is the power cord as the 921 is 20...


Check your Amps on the circuit that is being tripped. The treadmill needs 15 Amps to run. If you have a 15 Amp circuit that is running the treadmill and other electronics (or lights), the circuit will trip. You may need to replace the circuit with more Amps.

Mar 02, 2011 | Precor 9.21 Treadmill

4 Answers

My Precor 9.35 treadmill keeps shutting off. At first I thought this was due to use or it getting overheated. But, today I turned it on several times and it would shut off as I was walking on it. The...


Is it on an extension cord? Take it off any extension cords and make sure it's on a dedicated 120v circuit. No other items on the circuit. Also, how old is it? Precor made a bunch of the 9.3x series from 2002-2005 with an aluminum tail roller that can cause problems. Check the back roller. Is is silver and non-magnetic? if that's the case, you have an aluminum roller and you need to contact precor. If you're the original owner of the machine, they should warranty the replacement of the parts, if not, you'll have to buy at the very least a running belt and new roller.

Jun 21, 2010 | Precor 935 Premium Series Treadmill

1 Answer

My Treadmill shuts down after 10 mins on it. Can it be over heating. what could be wrong.


If you have not ever lubricated the running deck then I suggest doing so . What happens is that the lack of lubrication will tend to make the belt drag or stop . The lower board will register a excessive current thus shutting down. If the lubrication does work then you may need to replace the running belt and flip the deck if this process has never done.

Apr 21, 2010 | Precor 9.21 Treadmill

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