Troubleshooting Jandy Pool Pump Problems (Complete Guide)

If your Jandy pool pump won’t start, stops mid-cycle, or is throwing error codes on your AquaLink panel, you’ve landed in the right place. We’ve been repairing Jandy systems in the Inland Empire for 25 years, and we’ve seen every failure mode this pump line throws at homeowners. This guide walks you through the most common Jandy pump issues, what the error codes mean, how to troubleshoot them yourself, and when it’s time to call in a pro. By the end, you’ll know exactly what’s wrong with your pump and what it’ll cost to fix.

Understanding Your Jandy Pump: Single-Speed vs. Variable-Speed

Jandy makes two main pump categories: traditional single-speed pumps and modern variable-speed pumps. Knowing which one you have is the first troubleshooting step because they fail differently.

Single-Speed Pumps (Stealth, PlusHP)

Single-speed Jandy pumps run at one fixed speed, typically 3450 RPM. Models like the Stealth and PlusHP are workhorse designs that have been around for years. They’re tough, simple, and when they break, the parts are cheap. A single-speed impeller or diffuser might run you 50 to 100 dollars. The downside: they run at full power all the time, which burns energy and shortens filter life.

Variable-Speed Pumps (VS FloPro, ePump, VSSHP)

Variable-speed pumps (VSP) are the new standard in California thanks to Title 20 energy mandates that require most pools installed after 2018 to use them. Jandy’s VS FloPro and ePump lines let you dial down RPM for lower energy draw. They’re smarter, more efficient, and more expensive to fix. A drive board replacement runs 300 to 500 dollars. A full motor can hit 400 to 700 dollars.

Common Jandy Pump Error Codes (AquaLink Panel)

Your AquaLink control panel displays error codes when something goes wrong. Here are the ones you’ll see most often with Jandy pumps.

PMP Error Code

The PMP code means your pump isn’t responding to the control panel. This is a communication issue between the AquaLink and the pump itself. Before you panic, check your electrical connections at the pump. Corroded terminals, a loose breaker, or a tripped GFCI outlet will throw this code. Reseat all connectors at the pump housing and the control panel. If the code persists after a power cycle, you likely have a failed drive board (variable-speed) or a bad motor winding (single-speed). Cost to fix: 300 to 700 dollars depending on whether it’s the drive board or the motor.

FAI Error Code

FAI stands for “flow alarm inhibit” or a flow sensor fault. Your pump is running, but the AquaLink doesn’t see water moving at the speed it expects. Possible causes: clogged basket (most common), blocked intake line, closed isolation valve, or a bad flow sensor. Start by shutting off the pump, opening the basket housing, and cleaning out leaves, hair, or dirt. Close it back up, prime the pump if needed, and restart. If FAI persists, check that your isolation valve on the intake line is fully open. If both are good, the flow sensor itself may have failed. Replacement cost: 150 to 300 dollars.

PRR Error Code

PRR is a pressure relief fault. Your pump’s internal relief valve is stuck or the pressure switch is faulty. This usually means high pressure inside the pump body, which can happen if your filter is clogged or your impeller is damaged. First, check your filter gauge. If pressure is above 20 PSI on a standard pool, backwash the filter. If pressure is normal but you still see PRR, the relief valve or pressure switch needs replacement. Cost: 200 to 400 dollars.

Why Your Jandy Pump Won’t Start

A dead pump is one of the most stressful failures. Here are the usual suspects, in order of likelihood.

Power Supply Issues

Before you blame the pump, check the power. Is the breaker flipped? Is the GFCI outlet tripped? Jandy pumps need dedicated 240-volt power in most installations. If you’re running a variable-speed model, it also draws power from a low-voltage control wire to the AquaLink. Verify both the main power and the control signal are present. Use a multimeter if you know how, or hire an electrician. This saves 500 dollars if it’s just a breaker.

Tripped Thermal Overload

Jandy motors have an internal thermal protector that shuts down the pump if it gets too hot. This happens when the motor works hard for too long without enough cooling air, or when it’s trying to pump against high resistance (clogged filter, blocked intake). Shut off the pump and let it cool for 30 minutes. Clean your filter and check your intake line for blockages. Restart. If it trips again immediately, the motor is likely failing internally.

Bad Capacitor (Variable-Speed Drives)

The drive board on variable-speed Jandy pumps relies on large electrolytic capacitors. When one blows, the pump won’t start. You’ll sometimes smell a burnt-plastic odor near the equipment pad. You can’t fix this yourself. The drive board needs to come out and be replaced or sent to a specialist. Cost: 300 to 500 dollars. This is a common failure on VS pumps over 5 years old.

Locked Rotor

If the motor shaft is mechanically stuck, the pump can’t turn. This happens when the shaft seal fails and allows water inside the motor cavity. The rotor rusts, the bearing seizes, and the motor won’t budge. You can try to manually turn the shaft by hand using an open-end wrench on the flat nut at the back of the pump. If it won’t move, the motor is toast. Replacement cost: 400 to 700 dollars for a new motor, or 1200 to 1800 dollars for a complete new variable-speed pump installed.

Jandy Pump Is Running But Not Pumping Water

Your pump is on, the motor is spinning, but no water is coming out of the return line. This is a priming issue, and it’s fixable.

The Pump Lost Its Prime

A primed pump is full of water, not air. If air gets into the suction line, the pump sucks air instead of water and spins uselessly. This happens after you’ve opened the pump housing, shut down for maintenance, or after a water level drops too far in the pool. To re-prime a Jandy pump, open the air relief valve (a small screw on top of the pump housing) and watch for water to trickle out. Close it when water is flowing steadily. Then start the pump. You should feel suction at the intake and water flowing out the return line within 10 to 15 seconds. If priming doesn’t work, check that your pool water level is above the midpoint of the skimmer opening. Low water stops the suction line from feeding the pump.

Blocked Intake or Impeller Damage

If the pump is primed but still won’t move water, the intake line is blocked or the impeller is damaged. Shut down the pump, close the isolation valve on the intake line, and open the basket housing. Look inside. Leaves, rocks, and dead frogs get stuck here. Clean it out. If the intake looks clear, the impeller inside the pump housing might have cracked or eroded. This requires opening the pump and replacing the impeller. Cost: 150 to 300 dollars for the part and labor.

Clogged Filter

A filthy filter blocks flow and triggers pressure relief. Your pump will run, but almost no water gets through. Check your filter pressure gauge. Anything above 20 PSI is high. Backwash your sand or cartridge filter. If you haven’t backwashed in weeks or months, do it now. This solves 60 percent of “running but not pumping” calls.

Jandy Pump Is Leaking

Water dripping from your pump is a sign of seal failure. Where it’s leaking tells you what failed.

Leaking from the Shaft Seal

A slow drip from the lowest point of the pump body is a failing shaft seal. This is the part that keeps water out of the motor cavity. A small drip is manageable for a while, but once it starts, it gets worse. Water inside the motor causes rust, bearing corrosion, and eventually a locked rotor. If you’re handy and comfortable working with mechanical seals, you can replace the shaft seal for 50 to 150 dollars in parts. Most homeowners hire a technician. Cost: 200 to 400 dollars labor plus parts.

Leaking from the Basket Lid O-Ring

The basket housing has a lid that screws down. Inside is a rubber o-ring that seals. If this o-ring is dried out, cracked, or missing, water seeps out around the lid. Remove the lid, take a look at the o-ring, and replace it if it’s brittle. Cost: 10 to 25 dollars. This is the cheapest Jandy pump fix you’ll encounter.

Leaking from the Union Connections

Jandy pumps connect to your pool plumbing via union fittings (threaded connections). Over time, these corrode or get loose. Tighten the union nut by hand first. If it still leaks, you might need to replace the gasket inside. Shut off the pump, close isolation valves, unscrew the union, and swap in a new gasket. Cost: 5 to 20 dollars, 15 minutes of work.

Jandy Pump Motor Bearing Wear and Noise

Jandy pumps are loud machines, but there’s normal loud and then there’s concerning loud. A high-pitched squealing or grinding noise is a sign that bearings are wearing out.

Squealing Sound

A squealing noise, especially at startup, often points to the pump bearings drying out. Jandy pump bearings are lubricated by water flow. If water isn’t circulating properly (low flow, blocked intake), the bearings dry out and squeal. Make sure your intake line is clear and your filter isn’t clogged. If the pump runs quietly after you clear the blockage, problem solved. If squealing persists, the bearings are worn and the pump is nearing end of life. Cost to replace: 400 to 700 dollars for a new motor.

Grinding or Rumbling Sound

Grinding or rumbling means something inside the pump is hitting something else. This could be a partially damaged impeller, a stuck bearing, or debris inside the housing. Never ignore this. Shut down the pump immediately and inspect the impeller through the basket housing opening. If you see cracks or pieces missing, the pump needs repair or replacement. If the housing looks clear, have a technician open it up for diagnosis. Cost: 300 to 800 dollars depending on damage.

Variable-Speed Pump Specific Issues

Variable-speed Jandy pumps have their own failure modes because of the drive board and electronic controls.

Drive Board Failures

The drive board is the “brains” of your variable-speed pump. It communicates with the AquaLink panel, controls motor speed, and monitors amp draw. When the drive board fails, the pump usually won’t start or won’t respond to speed commands. Error codes like PMP or FAI often indicate drive board problems. You can’t repair a drive board yourself. It either needs to be replaced (300 to 500 dollars) or sent to a Jandy specialist for rework (150 to 250 dollars plus shipping). If your pump is under 5 years old, the drive board might still be under warranty.

Low Flow Alarm on AquaLink

Your variable-speed pump has a built-in low-flow alarm. If the pump isn’t moving enough water at the current speed, the AquaLink detects it and either slows the motor further or throws an error. This is a safety feature, but it’s annoying when it’s triggered by a clogged filter or blocked intake. Clean your filter and check your intake line. If the pump still alarms, the flow sensor might be faulty or the drive board might be misreading it. Cost to fix: 150 to 300 dollars for a new flow sensor.

Motor Won’t Ramp Up to Full Speed

Your variable-speed pump should be able to run anywhere from 600 RPM to 3450 RPM depending on your pool’s needs. If it stalls at a low speed and won’t ramp up, the drive board is often to blame. Check the AquaLink settings to make sure you’ve set the pump to a high enough speed. If the settings are correct but the pump won’t go higher, the drive board or motor coils need inspection. Cost: 300 to 700 dollars.

Step-by-Step: How to Replace a Jandy Pump Drive Board

If your variable-speed Jandy pump has a confirmed bad drive board, here’s what replacement looks like. This is a job for someone comfortable with plumbing and electrical work, or a good time to call a technician.

Tools and Materials You’ll Need

• Adjustable wrench (for union nuts)
• Screwdriver set (Phillips and flathead)
• Needle-nose pliers
• Multimeter (to verify power is off)
• Replacement drive board (specific to your pump model)
• Bucket (to catch drips)
• Marking tape and pen

The Process

Step 1: Turn off power at the breaker. Flip the switch to OFF and verify it’s secure. Use your multimeter to confirm there’s no voltage at the pump terminals.

Step 2: Close the isolation valves. If your pump has ball valves on the intake and return lines, close both. If not, shut off the main system at the AquaLink and allow pressure to bleed.

Step 3: Unbolt the drive board. The drive board sits on top of the motor or inside the pump housing depending on your model. It’s held down by two to four bolts. Remove them and set them aside.

Step 4: Disconnect the power wires. The drive board has a thick power cable (240 volts) and a thin control wire (to the AquaLink panel). Take a photo before you disconnect so you know where they go. Label the wires with tape if needed.

Step 5: Disconnect the motor wires. Three or four wires connect the drive board to the motor. Again, mark them or take a photo.

Step 6: Slide out the old board and slide in the new one. Line up the mounting holes and bolt it down. Reconnect power and motor wires in the same order.

Step 7: Turn on power and test. Flip the breaker back on. The AquaLink should recognize the pump within 10 seconds. If you see a PMP error still, the new board might be bad or the connections aren’t tight.

Cost and time: Drive board runs 300 to 500 dollars. Labor is 1 to 2 hours if you do it yourself, or 200 to 400 dollars if you hire a technician.

Jandy Pump Cost Breakdown: When to Repair vs. Replace

Here’s the hard truth: sometimes it’s cheaper to buy a new pump than to fix the old one. Here’s the cost framework for the Inland Empire.

Single-Speed Pump Repair Costs

• Impeller or diffuser: 50 to 150 dollars
• Shaft seal: 200 to 400 dollars
• Basket lid o-ring: 10 to 25 dollars
• Full motor replacement: 400 to 700 dollars
• New single-speed pump installed: 800 to 1200 dollars

Variable-Speed Pump Repair Costs

• Drive board replacement: 300 to 500 dollars
• Flow sensor: 150 to 300 dollars
• Motor replacement: 400 to 700 dollars
• Full variable-speed pump installed: 1200 to 1800 dollars

The Repair vs. Replace Decision

If your pump is over 10 years old and the repair costs more than 50 percent of a new pump, replace it. If the pump is 5 to 10 years old, repairs usually make sense unless the motor is dead (locked rotor, winding failure). If the pump is under 5 years old and under warranty, always repair. Variable-speed pumps are harder on the wallet to repair, but they save money on energy bills. A Title 20 compliant VSP will pay for itself in 3 to 5 years compared to running a single-speed pump 24/7.

DIY Troubleshooting Checklist

Before you call a technician, run through this quick checklist. You might solve it in five minutes.

1. Is the breaker on? Flip it off and back on.
2. Is the GFCI outlet tripped? Reset it by pressing the red button.
3. Is there water in the pool at the skimmer midline? If not, fill it.
4. Is the isolation valve on the intake line fully open? Check by hand.
5. Is the basket full of leaves or debris? Open the basket housing and clean it.
6. Is the filter dirty? Check the pressure gauge. Backwash if it’s above 20 PSI.
7. Is there an error code on the AquaLink? Write it down and cross-reference the error code list.
8. Are all electrical connections tight at the pump and the control panel? Reseat them.
9. Can you hear the motor humming even if the pump isn’t moving water? If yes, the motor works but there’s a flow issue. If no, the motor is dead.
10. How long has the pump been running? If it tripped a thermal overload, let it cool for 30 minutes and try again.

If you get through this list and the pump still won’t work, it’s time to call a pro.

Hayward and Pentair: How Jandy Compares

Jandy isn’t the only pump brand in the pool business, but it’s a solid choice. Here’s how it stacks up.

Jandy vs. Hayward

Hayward pumps are similar in design to Jandy and often cost about the same. Hayward’s single-speed lines (like the Power Flo) are workhorses. Hayward variable-speed pumps (EcoStar) are reliable and more energy-efficient than older Jandy models. The main difference: Hayward parts are slightly easier to find and sometimes cheaper. Jandy pumps tend to hold up longer if you maintain them. If you’re choosing between the two, either is a safe bet.

Jandy vs. Pentair

Pentair makes high-end pumps like the SuperFlow and IntelliFlo. These are more expensive upfront (often 1500 to 2500 dollars installed) but they’re built tough and have longer warranties. If your budget allows, Pentair is a premium choice. If you’re managing costs, Jandy is the practical middle ground. Pentair parts are pricier and harder to find in the Inland Empire than Jandy.

The Real Story

We work on all three brands. Jandy is popular in our service area because it’s affordable, parts are available, and when they break, fixes are straightforward. Hayward runs a close second. Pentair is rarer but rock-solid when we see it.

Frequently Asked Questions

What does the PMP error code mean on my Jandy pump?

PMP means the pump isn’t communicating with the AquaLink panel. Check all electrical connections first. If connections are tight and the code persists after a power cycle, the drive board or motor winding has likely failed. Cost to fix: 300 to 700 dollars.

Can I run my Jandy pump 24/7?

Single-speed pumps can run 24/7 but they’ll drain your energy bill and wear out filters faster. Variable-speed pumps are designed to run longer hours at lower RPM, which saves energy. For 24/7 operation, a variable-speed pump is the smarter choice.

How often should I backwash my filter?

Backwash when your filter pressure rises to 18 to 22 PSI above the clean baseline. For most pools, that’s roughly every 4 to 8 weeks depending on debris and usage. A clogged filter is the number-one reason pumps fail prematurely.

Why is my Jandy pump leaking?

Most leaks are from the shaft seal (water dripping from the lowest point), the basket lid o-ring (seeping around the lid), or loose union connections (trickling from the threaded fittings). The shaft seal is the most serious. The o-ring is the cheapest to fix.

Is it cheaper to repair or replace a Jandy variable-speed pump?

If repair costs more than 50 percent of a new pump, replace. If the motor is locked or the windings are dead, replace. If it’s a drive board or sensor, repair usually makes sense. A new variable-speed pump installed runs 1200 to 1800 dollars.

What’s the difference between a single-speed and variable-speed Jandy pump?

Single-speed runs at one fixed RPM (usually 3450). It’s simple and cheap to repair but uses more energy. Variable-speed runs from 600 to 3450 RPM and adjusts based on demand. It costs more upfront and to repair, but saves energy and is required by California Title 20 for most new pools.

My Jandy pump won’t prime. What do I do?

Open the air relief valve on top of the pump and watch for water to drip out. Close it when water flows steady. Make sure your pool water level is above the skimmer midline. If priming still fails, the intake line is blocked or the impeller is damaged. Check the basket and intake line first.

How long do Jandy pumps last?

Single-speed pumps last 8 to 12 years with regular maintenance. Variable-speed pumps last 10 to 15 years because they run cooler and at lower average stress. Major repairs (motor, drive board) happen around year 5 to 7 on both types.

Can I replace just the motor on my Jandy pump?

Yes. If the motor has failed but the housing and impeller are good, you can buy a replacement motor and bolt it in. Cost: 400 to 700 dollars. This extends the life of your pump and saves money compared to buying a whole new unit.

What’s a normal pressure reading on my pool filter?

Clean filter pressure is 10 to 15 PSI. Normal operating pressure is 15 to 20 PSI. Above 22 PSI, backwash. If pressure stays high even after backwashing, the filter media is shot and needs replacement.

When to Call a Professional

You can troubleshoot simple issues yourself, but know your limits. Call a technician if:

• You see a PMP or FAI error code that doesn’t clear after you’ve cleaned the basket and backwashed the filter.
• The pump won’t start and the power is definitely on.
• You hear grinding or squealing and you don’t see an obvious blockage.
• Water is leaking from inside the motor cavity or the drive board.
• Your variable-speed pump won’t ramp up to higher speeds.
• The motor is locked or won’t turn by hand.
• You’re not comfortable working with electrical connections or plumbing unions.

Pool repairs can go sideways fast if you guess wrong. One mistake with the wrong part or a loose connection can turn a 300-dollar fix into a 1500-dollar disaster.

Book a Free Estimate

If your Jandy pump is acting up and you’re in the Inland Empire, we’re here to help. We’ve been repairing Jandy systems since the late 1990s, and we know every quirk this brand throws at us. Call us at (909) 330-4730 for a free diagnosis. We’ll listen to your problem, ask some clarifying questions, and give you an honest estimate before we touch anything. No pressure, no sales pitch. Just good, straight-talking pool repair from people who’ve been doing this for 25 years.