Repair guide
Sole Treadmill Repair Guide: F63, F80 & F85 Fixes
Sole F63, F80 or F85 won't power on, slips or shows E01? Fixes from Sole's 2026 manuals, plus the warranty rules that trip owners up.
Published October 27, 2026
TL;DR: Sole's service checklists point to four first checks for a dead display or a tripping breaker: the safety tether, the push-in breaker on the front grill, a shared household circuit, and a dry deck. The F63 and F85 manuals say to plug the treadmill into a 120-volt, 15-amp grounded outlet with nothing else on the circuit, and all three manuals say to lubricate every 90 hours of use or every 90 days, whichever comes first. They also say skipping lubrication may void the warranty. Belt adjustments are done in 1/4-turn steps with the supplied 6 mm Allen wrench.
The steps below come from Sole's 2026 owner's manuals for the F63, F80 and F85. Page numbers are the printed ones. If your treadmill is an older production run, check the manual that came with it before adjusting anything.
Quick symptom guide
| Symptom | Most likely cause | First check | Go to |
|---|---|---|---|
| Display stays dark | Tether, tripped breaker, plug | Tether in place, front-grill breaker | Won't turn on |
| Household breaker trips | Shared or AFCI/GFCI circuit | Is the treadmill alone on the circuit? | Trips the breaker |
| Treadmill's own breaker trips | Belt-to-deck friction | Lubrication | Trips the breaker |
| LUBE on the display | 90-hour reminder | Check the deck, then lubricate | Lubricating |
| E01 to E06, E22, E31 | Overload, motor, voltage, communication, heat | Look up the code | Error codes |
| Belt slips or hesitates | Loose tension or dry deck | Rear roller bolts | Belt |
| Belt drifts to one side | Tracking | Left bolt, 1/4 turn | Belt |
| Incline error (E3) | Incline cable or calibration | Cable, then recalibrate | Incline |
Sole treadmill won't turn on or the display is dead
Sole's service checklist lists these causes for a display that doesn't light (F80 and F85 manuals p. 32; F63 p. 28):
- The tether (safety key) isn't in place. The treadmill won't power on without it. The F80 and F85 lists name this explicitly.
- The circuit breaker on the front grill has tripped. It's a push-in type: push it in until it locks.
- The plug has come loose from the wall or the treadmill.
- The household breaker has tripped.
- A treadmill defect, which is the last thing to assume.
Check them in that order. The power switch sits at the front below the motor hood (F63 manual p. 13), so make sure it's on too. If everything checks out and the console is still dark, that's a job for service.
Sole treadmill trips the breaker or shuts off
There are two different breakers here, and Sole's service checklist treats them differently (F63 p. 28; F80 and F85 p. 32):
- The treadmill's own 15-amp breaker trips: Sole's checklist attributes this to high friction between the belt and the deck. Lubricate (see below) before you suspect the motor.
- Your household breaker trips, but the treadmill's doesn't: make sure the treadmill is the only appliance on that circuit.
Sole's setup instructions call for a 120-volt, 15-amp grounded outlet with only the treadmill plugged into the circuit (F63 and F85 manuals, p. 2). The manuals add that voltage swinging by 10% or more can affect performance, and that the warranty doesn't cover those conditions (p. 3).
Two more points from the same pages:
- AFCI and GFCI breakers: Sole says to avoid them if possible, because the surge of current when a treadmill motor starts can cause nuisance trips (p. 3). If you can't avoid one, the treadmill should be the only thing on it.
- Extension cords: The manuals discourage them and give different gauges in different places (14 AWG on p. 2, 16 gauge on the service chart), so skip the cord. Plug straight into the wall.
A related symptom: if the treadmill only reaches around 7 mph while the console shows a higher speed, the same checklist points to low AC voltage (F63 p. 28; F80 and F85 p. 32).
Sole treadmill error codes
These codes and first checks come from the manuals' own tables (F63 p. 23; F80 and F85 p. 33). The F63, F80 and F85 tables share E01 to E06, E3, E22 and E31. Note that E3 (incline) and E03 (current) are separate codes.
| Code | Meaning | First thing to try |
|---|---|---|
| LUBE | 90-hour lubrication reminder | Lubricate, then reset (see below) |
| E01 | Over-current or overload | Reduce the load or re-power, check for a stuck part or a dry deck, check for a burning smell |
| E02 | Hall sensor error | Check the motor connection |
| E03 | Hardware current too large | Same checks as E01 |
| E04 | Phase loss | Check the motor connection |
| E05 | Undervoltage | Check input voltage and the power socket connection |
| E06 | Overvoltage | Check input voltage |
| E3 | Incline adjustment error | Check the incline cable, then recalibrate |
| E22 | Communication error between display and control board | Power off and restart |
| E23 (F80, F85) | TFT display to LED display communication error | Power off and restart |
| E31 | Over-temperature | Let it cool |
| ERROR (F80, F85) | TFT communication failure | Power off for 2 minutes, then re-power |
Two things to know. First, for E01 through E04, the manuals' last step is to replace the motor or controller, and that's a technician call. Don't buy parts on a guess. Second, the F80 and F85 add E23 and the bare ERROR message because they use a TFT display. For codes from other brands, see our treadmill error codes guide.
If a code you see isn't in this table, it isn't in the tables we checked, so contact Sole rather than trusting a forum guess.
Belt slipping, hesitating or drifting
Sole gives a specific method for both tension and tracking (F63 p. 25-26; F80 and F85 p. 29-30). You'll need the 6 mm Allen wrench supplied with the treadmill.
Tension (belt slips or hesitates):
- Unplug the treadmill.
- The adjustment bolts are at the rear roller, reached through a small hole in each end cap at the end of the step rails.
- Turn each bolt 1/4 turn, then walk on the belt to test.
- Turn both sides evenly, or the belt will track to one side.
Sole says plainly: do not overtighten. Too much tension can damage the belt and wear out the bearings early. If the belt still slips after a lot of tightening, the manual points to the motor drive belt under the motor cover. Tightening that belt "should be done by a trained service person".
Tracking (belt drifts left or right):
- Run the belt at 3 mph.
- Use the left-side bolt only.
- If the belt is too close to the left, turn the bolt 1/4 turn clockwise and wait a few minutes. If it's too close to the right, turn it counter-clockwise.
- Repeat in 1/4-turn steps until it runs centered.
A new belt may thump as it turns. The F80 and F85 manuals say the roller-shaped area passing over the rollers causes this and that it wears in (p. 30).
Sole treats tracking as an owner responsibility. The manuals state that belt damage from improper tracking or tension adjustment isn't covered by the warranty, so go slowly. For how to tell a worn belt from one that just needs adjusting, see how to fix a treadmill belt.
How to lubricate a Sole treadmill
Unlike ProForm, whose manuals say not to lubricate unless support tells you to, Sole wants you to lubricate on a schedule. The belt and deck ship pre-lubricated, and Sole says to re-lubricate every 90 hours of use or every 90 days, whichever comes first, regardless of usage, because the deck can dry out (F63 p. 27; F80 and F85 p. 31).
Sole's manuals say to reach between the belt and the deck every other month, and to lubricate if you find none, even if the LUBE light is off.
Use the right product. Sole approves 100% food-grade silicone lubricant made for treadmills. One tube ships with the unit, and the Lube-n-Walk kit is also allowed. Don't use bathroom or kitchen silicone caulking, or anything with a spray or foam base. Sole's lubrication article also warns against WD-40 and petroleum products.
Steps (per the manuals, F63 p. 27; F80 and F85 p. 31):
- Power off and unplug the treadmill.
- Drag a clean, non-frayed rag under the belt for its full length once or twice to clear debris.
- Measure 18 inches from the edge of the motor cover.
- Reach under the belt about 4 to 6 inches from one edge.
- Squirt a line about 1/8 inch wide and 15 inches long in an "S" pattern, perpendicular to the motor cover. Use 2 to 3 oz in total.
- Repeat on the other side.
- Plug in and walk at a moderate speed for 5 minutes.
To clear the LUBE message, the F63 manual (p. 27) says to power the treadmill off and on three times, and the F80 and F85 error tables (p. 33) say the same.
Sole's manuals warn that skipping lubrication risks failure of the drive motor, drive belt and motor control board, and that it may void the warranty. For general technique, see our belt lubrication guide, but follow Sole's product and quantity rules.
Incline error (E3) and calibration
If the display shows E3, the manual says to check the incline cable and recalibrate. With the treadmill unplugged, make sure the cable is seated at both ends and not pinched.
The F63 manual gives a calibration procedure (p. 24): remove the safety key, press and hold Start and Speed 3 while you put the key back until the display shows "F1", then press Display/Enter and step through the settings. The process then runs automatically. Because it asks you to enter values such as roller and motor diameters, follow the manual's table rather than guessing.
We didn't find a separate calibration procedure for the F80 and F85 in the sections we checked, so use your own manual or contact Sole. Sole's own F63 calibration article describes a different key sequence from the manual. Go with the manual for your model.
Folding deck and cleaning schedule
The manuals cover folding (p. 12) but we didn't find troubleshooting for the folding cylinder. If your deck won't stay up or drops fast, stop using it and contact service. Never tilt the unit sideways once the shipping strap is off, because the deck can spring up.
Cleaning, per the manuals' maintenance chart (F63 p. 25-26; F80 and F85 p. 29-30):
- Monthly: wipe the belt edge and the area under it with a damp cloth, vacuum under the treadmill, and check belt tracking.
- Every other month: unplug, remove the motor cover, and vacuum dirt and hair. Check the wiring while you're there. Clean and inspect the deck.
Black dust during break-in is normal.
Warranty rules that affect your repair
Before you pay for a repair, check the warranty. Sole's 2026 manuals list (F63 p. 29; F80 and F85 p. 34):
| Coverage | F63 | F80 and F85 |
|---|---|---|
| Frame and drive motor | Lifetime | Lifetime |
| Parts | 2 years | 3 years |
| Labor | 1 year | 1 year |
| Cosmetic items | 90 days | 90 days |
Sole's product pages list different terms in places (including a 90-day labor period), so treat your manual and registration as the governing documents.
Several exclusions are easy to trip over:
- No lubrication or improper maintenance
- Inadequate power supply, power surges and lightning
- Use outside a climate-controlled, insulated space. The manuals name garages, carports and outdoor use.
- Damage from belt tracking or tension adjustments
- Non-original parts
Per the manuals, registration is required within 10 days (or with proof of purchase), the warranty isn't transferable, and coverage is limited to the continental US (F63 p. 29-30; F80 and F85 p. 34-35). To start a claim, contact your authorized dealer, use the service request form at soletreadmills.com/serviceparts.html, or call the number printed in your manual. Sole may ask for photos or video first.
When to call a technician
The fixes above cover the tether, breakers, circuit, lubrication, belt tension and tracking, and code lookups. Call a pro, or Sole, if:
- You smell burning or see scorch marks
- E01, E02, E03 or E04 keeps returning after the basic checks
- The belt still slips after correct tension, which points to the motor drive belt
- Incline calibration fails or E3 returns
- The fix means replacing a motor, controller or belt
If your Sole is still under warranty, contact Sole first so you don't void coverage. For out-of-warranty repairs, typical prices are in our treadmill repair cost guide, and older machines are covered in the repair or replace guide.
FAQ
How often should I lubricate a Sole treadmill?
Every 90 hours of use or every 90 days, whichever comes first, and sooner if the deck feels dry. Use Sole-approved food-grade silicone lubricant, 2 to 3 oz per application.
Why does my Sole treadmill keep tripping the breaker?
Sole's checklist points to a shared circuit (for a household breaker) or belt-to-deck friction (for the treadmill's own breaker). Put the treadmill on its own 120-volt, 15-amp grounded circuit, avoid AFCI or GFCI breakers if you can, and check the lubrication.
What does E01 mean on a Sole treadmill?
An over-current or overload fault. Sole says to reduce the load or re-power it, check for a stuck part or add lubricant, check for a burning smell, and check for a loose power socket plug and motor connection. If it persists, the manual's next step is to replace the motor or controller.
Is a Sole treadmill covered if I keep it in the garage?
Probably not. Sole's warranty excludes use outside a climate-controlled, insulated environment and names garages and carports. Check your own manual.
Sources
- Sole F63 owner's manual (effective February 1, 2026), pp. 2-4, 12-13, 23-30, retrieved October 2026 — https://www.soletreadmills.com/cdn/shop/files/2026_F63_OM.pdf
- Sole F80 owner's manual (effective February 1, 2026), pp. 12, 29-35, retrieved October 2026 — https://www.soletreadmills.com/cdn/shop/files/2026_F80_OM.pdf
- Sole F85 owner's manual (effective February 1, 2026), pp. 2-3, 12, 29-35, retrieved October 2026 — https://www.soletreadmills.com/cdn/shop/files/2026_F85_OM.pdf
- Sole Treadmills, "Sole Treadmill Lubrication Guide," retrieved October 2026 — https://www.soletreadmills.com/blogs/news/sole-treadmill-lubrication-guide-maintenance-tips
- Sole F63, F80 and F85 product pages (specs and warranty terms), retrieved October 2026 — https://www.soletreadmills.com/products/sole-f63
- Sole Treadmills, "How to Reset Sole Treadmills F63 Calibration Guide," retrieved October 2026 — https://www.soletreadmills.com/blogs/news/how-to-reset-sole-treadmills-f63-calibration-guide
- Sole Treadmills, "How to Adjust a Sole Treadmill Belt," retrieved October 2026 — https://soletreadmills.com/blogs/news/how-to-adjust-a-sole-treadmill-belt