Error codes on life fitness 90t, my treadmill just shows horizontal lines and only begins running after about a minute after I hit the increase speed button

Ask the manufacturer

If you wish to get some details about treadmill repair; check the site linked here. Pull up older posts.
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If you wish to get some details About treadmill Error codes ; check the site linked here. Pull up older posts almost all treadmills are listed . Surf the site with patience.
http://electro-medical.blogspot.com/

If you wish to get some details treadmill error codes; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/

Have to check the speed sensor. Either the speed sensor is faulty or the can be dust or speed sensor alignment.
If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/

worn belt and deck

see the instruc. manual if you do not have go to www.fitness.manualsonline.com or www.iconservice.com

God bless you

If the is a Next Gen unit need to enter Diagnostic menu by pressing and holding pause then press clear twice. Continue to hold pause until until read service menu. press any arrow up and select system test ,then press enter the display will begin to automatically scroll thru available options. press enter to access Main Motor Module the next window will be Speed Automatic.
Upon entering this test mode you will able to check the drive motor and motor control board. By using the the speed arrows you will be able see the actual speed if functioning if not it could possibly be the speed sensor or wire harness ( SIMPLE CONTINUITY CHECK WILL RULE IN OR OUT THE HARNESS ) and point the problem. Now if their is no belt movement then hit clear and proceed over to SPEED CONTROL ERRORS hit enter this test allows seeing the motor controller conditions that are being displayed on the motor controller display if any of these come up then the controller need s to repair or replaced:
Max Temperature, Maximum voltage, Fault Line 1 error, Static current trip and dynamic current trip ( this also can a running belt tension this can result in a cannot obtain speed error message ) hit clear to get out of diagnostic once you eliminated the problem. Good Luck!!!

Error 1 - Start up error. This is caused because the belt was commanded to move and the opto (speed sensor on the motor) has not seen any movement or the belts movement was interrupted prior to it reaching its commanded speed. To fix Verify opto operation in Diagnostics, Motor Test
Mode, Section 2. Verify DC voltage at connector P6 pins 1 and 2. Verify that LED 4 on the Motor Controller flashes as the motor moves. Let me know if you need any more help. Fitness Fix-It

running error