When a car lift wont go up troubleshooting the problem the right way saves you a service call and a lot of guessing. We hear this one constantly from shop owners across Iowa: the lift just sits there, motor humming or dead silent, arms not budging, and a vehicle stuck up in the air or worse, stuck on the ground when it’s needed. Auto Lift Services installs and services two post, four post, scissor, and mobile column lifts all over the state, and nine times out of ten the fix is something you can check yourself before calling us. Let’s walk through it in order, from simplest to most involved.
Need a motor, valve, cylinder seal kit, or safety lock replacement? We stock parts for every major lift brand and ship across Iowa fast.
Start With Power and the Motor
The most common reason a car lift wont go up is embarrassingly simple: no power getting to the motor. Before you tear into anything mechanical, check the breaker or disconnect feeding the lift. We’ve driven out to shops more than once where a breaker tripped overnight and nobody thought to check the panel first. Also check the power unit itself for a humming sound with no movement — that usually points to a bad motor capacitor, a seized pump, or a motor that’s wired for the wrong voltage after an electrical panel upgrade.
If the motor hums but the arms don’t move, listen closely. A single loud hum with no lift movement often means the pump is trying to push fluid but something downstream is blocking it, or the motor itself is failing internally. If there’s total silence and nothing happens when you hit the up button, check the control box wiring, the up/down toggle switch, and the foot pedal or button contacts for corrosion. Iowa winters bring moisture and salt into shop floors, and we replace corroded switches on two post lifts every season. This is where car lift wont go up troubleshooting starts and ends for a good chunk of the calls we take — it really is that basic before you go further.
Check the Hydraulic Fluid Level
Low hydraulic fluid is the second most common culprit, especially on lifts that have been in service for years without a fluid check. Pop the reservoir cap on the power unit and look at the level. If it’s low, that alone can prevent the pump from building enough pressure to raise the carriage or arms, even though the motor runs fine. Top off with the fluid type specified by the manufacturer — never substitute automotive hydraulic fluid types randomly, since some pumps are picky about viscosity.
While you’re in there, look for fluid on the shop floor around the base or power unit. A slow leak over months can drain a reservoir low enough that the lift struggles or refuses to rise at all. We’ve found leaking cylinder seals, cracked hydraulic lines, and loose fittings behind this exact symptom on lifts installed a decade ago that never had a seal kit replaced. If you’re chasing a slow leak, our parts team can match seal kits and hydraulic lines to your lift model so you’re not guessing at part numbers.
Inspect the Safety Locks and Latches
Two post and four post lifts both use mechanical safety locks that engage as the carriage rises, and if one of those locks is stuck, bent, or not releasing properly, the lift can appear stuck even though hydraulics are fine. On two post lifts, check that the lock bar or dog isn’t hanging up on the rail, and that the release cable pulling the lock free isn’t frayed, stretched, or disconnected on one side. An uneven lock release is one of the sneakier reasons a car lift wont go up smoothly on both columns at once.
On four post lifts and some scissor lifts, the safety catches sit along the columns or under the platform, and debris, rust, or a bent catch tab can jam things up. We recommend a visual walk-around any time a lift hesitates, catches, or refuses to move past a certain height — that’s almost always a lock issue rather than a hydraulic one. If you’ve already ruled out power and fluid and you’re still stuck, our guide on why a car lift wont lift covers additional lock and latch scenarios in more depth.
Air Supply Problems on Air-Assisted Locks
Many two post lifts use shop air to release the safety locks, which means a lift that’s mechanically and hydraulically fine can still refuse to rise if there’s no air pressure reaching the lock release cylinders. Check your compressor is running and building pressure, check the air line from the compressor to the lift isn’t kinked or disconnected, and check the small air cylinders at each column for stuck pistons. A drop in shop air pressure below the lift’s minimum requirement is enough to keep those locks engaged no matter what the hydraulics are doing.
We’ve also seen quick-disconnect air fittings crack or leak after years of use, bleeding off pressure before it ever reaches the lock cylinders. If you hear a hiss near the base of a column when the compressor kicks on, that’s your answer. Air issues get misdiagnosed as hydraulic or electrical failures constantly because the symptom looks identical from the driver’s seat — the lift simply won’t go anywhere.
Check the Control Valve and Solenoid
Between the motor and the cylinders sits a control valve, often with a solenoid that directs fluid flow for up and down movement. If this valve sticks, gets gummed up with old fluid, or the solenoid fails electrically, you can have a running motor, full fluid, and released locks, and still the lift wont go up. These valves are a common failure point on lifts that sit unused for long stretches, since debris and varnish can settle into the valve body.
Tapping gently on the valve housing while someone hits the up switch can sometimes free a stuck spool temporarily, which tells you it’s a valve problem worth replacing rather than rebuilding on the spot. We stock replacement control valves and solenoids for Rotary and Challenger commercial lifts as well as BendPak and Atlas home-garage models, so if this is your issue, you don’t need to hunt down an obsolete part number on your own.
Cylinder and Pump Wear Over Time
On older lifts, especially ones pushing fifteen or twenty years of daily use, worn internal pump components or a scored cylinder can mean the unit builds some pressure but never enough to actually raise a loaded vehicle. This shows up as a lift that moves slowly, strains audibly, or rises partway and stalls under load. It’s a different animal than a total no-go situation, but it falls under the same troubleshooting umbrella because the end result looks the same to a frustrated technician standing at the console.
Rebuilding or replacing a worn cylinder is more involved than swapping a switch or topping off fluid, and it’s usually where we recommend bringing in a professional set of eyes. If you’re already dealing with related symptoms like a lift that drifts down under load, it’s worth reading through our breakdown on when a car lift wont hold pressure, since worn cylinders often cause both problems together.
When to Call a Professional Installer
Some car lift wont go up troubleshooting is safe and reasonable for a shop owner or technician to handle solo — checking breakers, topping fluid, inspecting locks, listening for air leaks. Other issues involve pressurized hydraulic lines, electrical rewiring, or structural components that we strongly recommend leaving to a certified installer. A misdiagnosed lock or a rushed hydraulic repair on equipment holding thousands of pounds over your head is not the place to cut corners.
We service and install lifts across Iowa and carry parts for every major brand, so whether you need a single sensor or a full power unit swap, we can usually get you the right part or the right technician faster than a generic supplier. If your lift is raising unevenly, refusing to release locks on one side, or the up button just does nothing, give us a call before the vehicle sits stranded any longer than it has to. Related symptoms like a lift that won’t rise past a certain point are covered in our piece on a car lift wont raise fully.
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