Running mat keeps moving to the left

I don't know. You can try the company site requesting the information or one of the following 3rd party parts suppliers. The company site offers a lubircation kit (out of stock). Nor can I pull up a user manual for the treadmill at the company site. But you may have more luck getting information form one ob the belt suppliers. Prices seem to vary between $89 and about $150 for such. The belts seem to be sold in two different qualities and the number of plys varies among such. That doesn't necessarily mean the cheaper price indicates less quality. It is likely one type belt is used for home users and another in commercial enterprises (suggesting heavy use).

https://fitnessparts.com/product/york-pacer-2750-treadmill-walking-belt/

https://www.amazon.com/Treadmill-Belts-Worldwide-Fitness-Pacer/dp/B07QKJV5M3?th=1

https://yorkfitness.com/

Treadmill Maintenance How To Lubricate Treadmill Belt LED Blink Patterns on the Control Board Treadmill
Follow this steps carefully, in order to fix it.
If the problem persist, time to REPLACE the Controller board motor., by new one or Rebuilt.
Blessing.
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cell+whatsAPP:+50588611441

go google and type in--- user manual for york pacer 2500--and if there are pdf versions for download , that is where it will be

check at websites such as that below, just put in make and model and the words "owners manual" and hit the search button


Free Treadmill User Manuals ManualsOnline com

1) RUN the software calibration for diagnose, and troubleshooting and fix it.
2) see you instruction manual and follow the step.
God bless you

Dear Sir:
This is probably a 1) faulty speed sensor or 2)the speed sensor is not plugged in properly. Its also possibly a 3) faulty motor control board or lower board 4) Main motor faulty. . The error codes will differ between makes and models but could be e1.You must test

see my personal TIPS for diagnose and troubleshooting.

See if you can run the software calibration for diagnose and trouble.

sincerely. God bless you.

ernesto cuadra
managua, nicaragua. c.a.

Try this 3 web page:

1) Free. http://fitness.manualsonline.com

2) Pay:www.fitnessrepairparts.com

3) Pay: http://manualsfactory.com

e.cuadra

I have just got a pacer 3700 off a friend and she had no manual for it. it keeps saying error 1 and wont do anything. what can i do to make it run again?

Error 7 is a Safety Key Error....
That's the red circular magnetic insert that slots into the front of the console...
The manual says : Simply secure the safety key in place and then 
try again..
hope this helps

speed the belt up to around 4mph while adjusting the belt. you will see it centre very quickly. once centered leave it to run for a couple of minutes to see if it stays central.