The walking belt on this Lifestyler Expanse 8.0 Treadmill has slipped towards the left side; folding the left side of the belt over itself.

The manual says you need to be able to lift 40 lbs safely to raise of lower the treadmill running platform, I I would guess twice that to physically lift it. The weight limit for a person using it is 250 lbs

https://www.manualslib.com/manual/502826/Lifestyler-Expance-800.html#manual

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Contact manufacturer, they will usually send you a free copy.

see the video attached and proceed accoring.God bless you

1( adjust the REED switch, see the diagram, clean it, and tight the wires connectors very well.
2) replace the batteries.
3) clean the contacts batteries with special cleaner
4) retight the spring contacts batteries for better contacts.
5) tight the ribbon cables from keypadys vs display board.
6) tight the display board connectors vs lower board.

Dear Sir:

Please read the instruction manual carefylly.If you do not have please go for free download: www. fitness.manualsonline.com or www. iconservice.com

sincerely. God bless you

From the manual: Troubleshooting
Symptom: The walking belt slows when walked on
a. If an extension cord is needed, use only a 14-gauge general purpose cord of five feet or less in length.
b. If the walking belt is over-tightened, the treadmill performance may decrease and the walking belt may be permanently damaged. Remove the safety key and UNPLUG the power cord. Using the 3/16" allen wrench, turn both rear roller adjustment bolts counterclockwise. 1/4 of a turn. When the walking belt is properly tightened, you should be able to lift each side of the walking belt 3-4 inches off the walking platform. The center of the walking belt should just touch the walking platform. Be careful to keep the walking belt centered. Plug in the power cord, insert safety key and run the treadmill for a few minutes. Repeat until the walking belt is properly tightened.
c. If problem persists, contact customer service.

250lb

You may have a belt and deck problem. Test by the following procedure:
without the power on stand on the walking belt, push the belt in the, direction it normally turns. If the belt is very difficult to turn (on most treadmill) this means that you have high belt/deck friction I first apply silicone lubricant and see if that clear up the problem. Most problems originate from the belt and deck 75 to 85% of the time.

On occasion, you may have already damaged the DC board if you have high belt/deck friction. If the belt walks freely, you have a different problem.

Turn off the unit then lift belt and apply the lubricant on the middle of the running deck , then turn on unit start it at 1.0 mph start walking on it for about 5 minutes.

Fist off your treademill old and most likely they no longer make the parts. This was a unit sold at sears a longtime ago. Your buttons could be stuck at the top head board. you have to peel cak the membrane to un stick them. If not , then the lower board has blown. No repair for this. no replacement as well. you may to get a new treadmill. You may be able to do one more thing to work around the problem. I need to be paid someting to assist with that.

I’m happy to help further over the phone at https://www.6ya.com/expert/howard_079189dd4959a511