Treadmill screen flashes through programs on screen,Speed increases only when hold button down then back to 1

Please note that these instructions don't apply to all models of treadmills. Many recent models, including all models with touchscreen consoles, do not have the capability for the user to calibrate the speed.
Speed calibration is a process that is used to correct imbalances in the machine's operating speed.
Please note that this procedure involves pushing the machine to its maximum speed very quickly. Do NOT stand on the treadmill while performing this procedure.
First, you need to enter calibration mode on the console. To do this, press and hold the STOP and SPEED INCREASE buttons (this will be either an up arrow or a + (plus) symbol). While holding these buttons, insert the safety key onto the console. This will cause the machine to go into calibration mode. After this has occurred, you may let go of the buttons and the safety key.
Next, press the stop button once. This will enter advance the screen to the next feature of calibration mode. As said previously, do not stand on the treadmill while performing this procedure. Press and hold the speed increase button. Watch the console. You will see a number on the display that will increase as you hold the speed increase button. Continue to hold the speed increase button until the number changes to "85." This will take the treadmill to its maximum speed, which will also be displayed on the console. Please note that the example below only demonstrates the console displaying "85", not the treadmill's operating speed.

book an engineer, sound like motor controller, loose belt could also be a issue, needs a safety check where are you based ?

Must enter the engineer mode. Turn the machine ON. Wait until you see the "Select user" screen.
1 - Press and hold the key to increase the incline and the key to decrease the speed for 3 to 5 seconds.
2 - Use the arrows to increase speed to get to Eng3 program (or the arrows next to the Enter button).
3 - Press "Enter"
4 - Then press the green start button until KM appears on the screen.

Hi,

I will advice you try re-calibrate your treadmill, follow the procedure below to re-calibrate it,

Step 1 Stand on the side rails of the treadmill for safety purposes. Remove the safety key. Step 2 Press and hold the two incline buttons. The incline buttons are blue and on the left side of the display. Hold the up and down button simultaneously. Release the buttons when the display reads "Calibration."
Step 3 Press the green start button located either above or below the large, red stop button (depending on your model). Stay on the side rails as the treadmill belt begins to move. Both the speed and incline should go through their full range from lowest to highest, and then back down again.
Step 4 Repeat the process if the display does not read "Calibration Successful."

You have to 'RECALIBRATE" the treadmill. This happens to my F3 all the time and it is very frustrating. Evidently there is no "fix" except to "RECALIBRATE.".

Here is how to do it (pay close attention because it gets TRICKY!):

1) Turn "ON" the treadmill;

2) Press the "RESET" button;

3) Here is where it gets tricky:

After you press the "RESET' button "PLEASE WAIT" or "WAIT" comes on;
As soon as the screen goes "BLANK" but before "SELECT PROGRAM" appears, hold the "PAUSE" button down until "DIAGNOSTICS" appears.

(I told you that was tricky... so after you press "RESET"... 'PLEASE WAIT" will come on... as soon as the screen goes "BLANK" you must hold the 'PAUSE' button before "SELECT PROGRAM" comes on. If "SELECT PROGRAM": comes on you have pressed and held "PAUSE" TOO LATE! You must time it right between 'PLEASE WAIT" and "SELECT PROGRAM" when the screen is BLANK. Why LifeFitness made this so difficult is a MYSTERY!!!!)

OKAY... TO CONTINUE...

4) After "DIAGNOSTICS" appears, use the arrows to scroll to "CALIBRATION."

5) Then press the 'START" button (make sure it's the SILVER not the black START button!)

6) The treadmill will then automatically cycle through a series of tests including speed and incline adjustments in order to complete the "CALIBRATION."

7) When successfully completed, the console will display: "PASS"

8) YOU'RE DONE! And your incline should work now. You may have to TURN OFF the treadmill and TURN it back "ON" so that you can resume using the treadmill.

Hope this helps! Once again... LifeFitness should have made this 'RECALIBRATION" much simpler!

Good luck! It's very hard the first time... but once you do it a few times, it gets easier!

With the safety key in place, press and hold “ELEVATION UP” and “SPEED DOWN” for 5 seconds. The software version will appear in display window shortly before model number appears. Press “ENTER” to accept correct model number IF YOU CANNOT GET INTO CALIBRATION EITHER UPPER CONSOLE ELECTRONICS OR OVERLAY CONSOLE ASSEMBLY HAS FAILED.
• Press “STOP” to enter “ENG1”. Press “ENTER”. PLEASE NOTE: HR Window = “0” for miles, “1” for kilometers, treadmill will calibrate in kilometers if set for kilometers. STEP 2 MINIMUM SPEED • Press “ELEVATION DOWN” button, “P0” will appear in display. • Press “START” button, the running belt will begin to move at minimum speed. • The display window should read approximately “.49 - .51”. • To adjust, press “SPEED UP” or “SPEED DOWN” buttons, the range should be “.49 - .51”. Press and hold “ENTER” to save changes. Press “STOP” to return to “P0”. STEP 3 1/4 SPEED • Press “ELEVATION UP” button, “SP1” will appear in display. • Press “START” button, the belt will move 1/4 speed. • The display should read approximately “2.71 - 2.73”. • To adjust, press “SPEED UP” or “SPEED DOWN” buttons, the range should be “2.71 - 2.73”. Press and hold “ENTER” to save changes. Press “STOP” to return to “SP1”. STEP 4 1/2 SPEED • Press “ELEVATION UP” button, “P1” will appear in display. • Press “START” button, the belt will move at 1/2 speed. • The display should read approximately “6.72 - 6.73”. • To adjust, press “SPEED UP” or “SPEED DOWN” buttons, the range should be “6.72 - 6.73”. Press and hold “ENTER” to save changes. Press “STOP” to return to “P1”. STEP 5 3/4 SPEED • Press “ELEVATION UP” button, “SP2” will appear in display. • Press “START” button, the belt will move at 3/4 speed. • The display should read approximately “9.41 - 9.43”. • To adjust, press “SPEED UP” or “SPEED DOWN” buttons, the range should be “9.41 - 9.43”. Press and hold “ENTER” to save changes. Press “STOP” to return to “SP2”.
STEP 6 MAXIMUM SPEED • Press “ELEVATION UP” button, “P2” will appear in display. • Press “START” button, the belt will move at maximum speed. • The display should read approximately “12.10 - 12.12”. • To adjust, press “SPEED UP” or “SPEED DOWN” buttons, the range should be “12.10 - 12.12”. Press and hold “ENTER” to save changes. Press “STOP” to return to “P2”. STEP 7 MINIMUM ELEVATION • Press “ELEVATION UP” button twice, “P4” will appear in display. • The display should ready approximately “190 - 205”. • To adjust, press “ENTER” for value which should read “190 - 205”. Use “SPEED UP” or “SPEED DOWN” buttons. Press and hold “ENTER” to save changes. Press “STOP” to return to “P4”. STEP 8 MAXIMUM ELEVATION • Press “ELEVATION UP” button, “P5” will appear in display. • The display should read approximately “750 - 765”. • To adjust, press “ENTER” for value which should read “750 - 765”. Use “SPEED UP” or “SPEED DOWN” buttons. Press and hold “ENTER” to save changes. Press “STOP” to return to “P5”. REMOVE SAFETY KEY TO EXIT ENGINEERING MODE REPLACE SAFETY KEY AND PRESS START TO TEST TREADMILL

Testing Mode 1. Enter the testing mode after switching the treadmill POWER ON by pushing first ‘SELECT’ and then‘SPEED DOWN’ and hold buttons pressed simultaneously 2. LED scanning mode for verifying display functionality 3. Press ‘ENTER’ to scan DATA LINES to verify display functionality 4. Press ‘ENTER’ to scan SACN LINES to verify display functionality 5. Press ‘ENTER’ to scan LED’s to verify display functionality 6. After pressing ‘ENTER’ the TIME window shows “test” and the keypad functionality can be tested (the value displayed changes when a button is being pressed) 7. Press ‘ENTER’ to enter IO mode (TIME display shows lift motor potentiometer value, SPEED reads speed from speed sensor and DISTANCE shows heart rate pulse) Press ‘START’ to test lower board relay (a “click” sound) and then press ‘ELEVATION UP’ for 2 seconds to increase the elevation to 8%. Press ‘ELEVATION DOWN’ to decrease the elevation to minimum percentage 0% Press ‘SPEED UP’ to increase speed value and ‘SPEED DOWN’ to decrease speed value. Press ‘ENTER’ to repeat above test or ‘SELECT’ and ‘ SPEED DOWN’ buttons simultaneously to return to the normal mode

SimplerFASTERSolution So, I had the same problem. After removing the motor cover I checked everything out per earlier instructions. Everything looked great. Having been a software geek for as long as I've been running (35 years), I as inclined to believe this wasn't a hardware problem at all. It appeared to me that the system just needed to be recalibrated. So...here's what I did. I turned the treadmill on and selected the "Manual" program and hit "Start". The monitor, as usual, counted down 3-2-1. As soon as the rollers started to move I hit the "Slow" button on the right upright several times so I knew that the treadmill was running at it's slowest speed. I then started walking on the belt. I started tapping the "Fast" button and let the belt gradually increase in speed and took it up to 6.0. No problem! But...nobody wants to start each workout that slowly. I had a hunch it was 'fixed'. So, I stopped the treadmill and turned everything off. I started it again, selected "Manual", immediately hit the "2" then he "4" then the "6" on the right hand "Speed" panel, and it ran like new. No service call, no new speed sensor, no fiddling with the little 'diode', etc. Give this a try first...no need to even remove the motor cover. Best of luck!

i just called the manufacturer on this and found out i have a faulty control panel, but these are the steps they told me to go through to reset. If it works, then you are good, if not, you may also have a control panel issue.
1. plug in and turn on treadmill, keep red key out
2. press and hold the stop button and speed up button at the same time and hold them while you insert the red key
3. after red key is inserted, let go of both buttons
**CAUTION - be sure to stand on side bars of treadmill, clear of the belt for this next part bc it will go VERY FAST***
4. press stop button once
5. press speed up button until it reads 85 (see what i mean?!)
6. press stop button once
7. press incline down or up one time and it should get back into normal mode. mine just started a series of flashing lights and "8"s in all the "windows" so my panel needs to be replaced. here is the number i called - 1-877-993-7999. Good Luck!