When a technician calls us and says the lift won’t raise, our first question is never “what’s broken” — it’s “what does it do when you hit the button.” Lift wont raise troubleshooting almost always follows a pattern, and after years of service calls across Iowa shops we’ve learned that most no-raise complaints trace back to one of about six things. This guide walks through the exact order we check them in, so you can figure out whether you’re looking at a five-minute fix or a part order before you pick up the phone.
Search by lift brand and model to match motors, valves, seal kits, and cylinders before you order anything for your no-raise complaint.
Start With Power, Not the Pump
Every round of lift wont raise troubleshooting has to begin at the disconnect, not the power unit. We’ve rolled up to more than one “dead lift” that turned out to be a tripped breaker or a loose lug at the disconnect box. Pull the cover, check for 220V or 208-230V single or three phase depending on the unit, and confirm voltage is actually present at the motor terminals, not just at the panel. A motor that hums but doesn’t turn is a different problem than a motor that’s silent.
If you’ve got three-phase power, check for a missing leg — this is one of the most common causes we see and it’s often mistaken for a bad motor. A motor trying to run on two legs will hum, get hot, and trip its overload, but the carriage never moves. Also check in-line fuses and any reset button on the motor housing itself; thermal overload trips are common on units that have been run hard in July heat. None of this requires tools beyond a multimeter, and it eliminates the most common cause before you touch a single hydraulic fitting.
Listen to the Motor Before You Open Anything
A motor that runs but the lift still won’t raise tells you the electrical side is fine and the problem is downstream. That’s actually good news — it narrows lift wont raise troubleshooting to the pump, valve, or cylinder side fast. A motor that hums loudly without turning usually means a locked pump or a capacitor issue. A motor that runs quiet and normal but nothing happens usually points to a stuck or improperly seated check valve, low fluid, or an air-locked line.
Check the fluid reservoir first — low hydraulic fluid is genuinely one of the top reasons a two post or four post lift won’t build pressure, especially after a hose or fitting was recently replaced and not fully bled. Top off with the fluid type specified for your unit and cycle the release valve a few times. If the pump runs and fluid moves but the carriage still creeps or won’t hold, that’s a different symptom pointing toward internal pump wear rather than a raise failure, so keep those two symptoms separate in your notes.
Check the Release Valve and Lock Mechanism
We’ve been called out on lift wont raise troubleshooting jobs where the actual issue was a lock pawl or release cable holding the system in a state that mimics a hydraulic failure. If your lift has a mechanical lock system, confirm the release cable isn’t seized or over-tensioned in a way that’s binding the carriage against the column. On some two-post designs, a stuck lock will physically prevent movement even with full hydraulic pressure behind it, and it can feel identical to a pump problem from the operator’s seat.
Inspect the lock pawls for rust or debris, especially on lifts that live in unheated Iowa bays where road salt and moisture get tracked in all winter. A little penetrating oil and a manual cycle of the release mechanism resolves more of these calls than people expect. If the lock frees up but the lift still won’t move, you’ve now ruled out the mechanical side entirely and can focus purely on hydraulics and electrical.
Inspect the Cylinder and Seals
If power, pump, and locks all check out, the next stop in lift wont raise troubleshooting is the cylinder itself. A cylinder with worn seals will let fluid bypass internally, meaning the pump builds pressure but the piston never gets enough to overcome the load. Look for fluid pooling around the base of the cylinder or drips along the piston rod — that’s a strong sign the seal kit has failed and needs replacement rather than just a fluid top-off.
On older units, especially those original to the shop, cylinder wear is simply a maintenance milestone rather than a sign of abuse. We stock seal kits and full replacement cylinders for the major commercial brands we service, and swapping a cylinder is usually a same-day job for our crew once the part’s on hand. If you’re seeing fluid loss at the cylinder and the lift is more than a decade old, budget for a rebuild rather than chasing the symptom repeatedly.
Rule Out Valve and Solenoid Failures
Hydraulic lifts rely on a solenoid-controlled valve to direct fluid to the cylinders, and a stuck or burnt-out solenoid is a classic no-raise culprit that gets missed because it doesn’t look dramatic. Listen for a click when you hit the raise button — no click generally means the solenoid isn’t firing, which could be a bad coil, a wiring fault, or a control board issue depending on your lift’s design. A click with no lift movement usually means the valve itself is gummed up or the spring inside has failed.
We keep replacement solenoids and valve assemblies in stock for Rotary and Challenger commercial units because this is one of the more frequent parts requests we get from Iowa shops running older equipment. Cleaning a sticky valve sometimes buys time, but a valve that’s failed once tends to fail again soon, so we usually recommend replacing rather than servicing once you’re already inside the housing.
Know When It’s a Bigger Structural Issue
Occasionally lift wont raise troubleshooting reveals something beyond parts — a bent equalizer cable pulley, a column that’s shifted out of alignment, or a carriage binding against the column itself from years of uneven loading. These issues won’t be fixed by a new solenoid or a fluid top-off, and running the lift while it’s binding can accelerate wear on the columns and cables dramatically. If you’ve replaced the obvious parts and it still won’t raise smoothly, it’s worth having an installer inspect the frame and alignment rather than continuing to swap components.
This is also the point where DIY troubleshooting should hand off to a certified technician, particularly on commercial two-post and four-post lifts carrying real vehicle weight. We’ve seen shops lose weeks chasing the wrong part because nobody checked alignment first. For more detail on specific symptoms, our related guides on hydraulic lift wont raise troubleshooting and two post lift wont raise troubleshooting break down brand-specific quirks in more depth.
When to Call a Technician Instead of Guessing
There’s a point in every lift wont raise troubleshooting session where continuing to swap parts costs more than just calling someone who does this daily. If you’ve checked power, fluid, locks, cylinder seals, and valves and you’re still stuck, or if you’re not comfortable opening a power unit housing, that’s the line. We’d rather talk you through one more check over the phone than have you order a part that wasn’t the actual problem.
Our crew also handles this remotely when distance makes an on-site visit impractical right away — a few photos of the power unit and a description of what the motor sounds like usually gets us to a diagnosis fast. And if the issue turns out to be wiring related rather than hydraulic, our guide on lift wont lift troubleshooting covers the electrical side in more detail. Either way, don’t keep running a lift that’s showing these symptoms — a partial raise or intermittent failure under load is a safety issue, not just an inconvenience.
Our Clients Include: