Pentair Prowler 920 Starts Then Stops – We have a Quick Fix

So suddenly, you have noticed that your Pentair Prowler 920 starts then stops. And it keeps going on and on. If you take it to the service centers, they will cost you around $150 for this when you can fix it yourself. So why my Pentair Prowler 920 starts then stops and how to fix it?

Bad relay or main logic board, Moisture accumulation in the circuits, and Power supply or motor unit issues can cause the issue. But most of the time, the problem is with the maintenance. The impeller gets clogged with debris, and it jams the impeller, which stops the cleaner after running for a few seconds..

But how to clean the cleaner or how to solve the Bad relay or main logic board, Moisture accumulation in the circuits, Power supply, or motor unit issues? Well, we will discuss everything in detail. Stay with us.

Causes and solution for Pentair Prowler 920 starts then stops

Let’s see the causes and solution to the problem.

Clogged Impeller

The impeller, located inside the unit, can become clogged with debris over time. This build-up restricts water flow, affecting the unit’s performance and causing it to start and then stop.

How to fix the problem

  • Turn off the power supply to the Pentair Prowler 920 by switching off the breaker.
  • Locate the access panel or compartment where the impeller is housed.
  • Remove any screws or fasteners securing the panel and carefully take off the panel to expose the impeller.
  • Inspect the impeller for any visible debris, such as leaves, twigs, or dirt.
  • Clean the impeller thoroughly using a soft brush, cloth, or compressed air to dislodge and remove the debris.
  • Ensure that all obstructions are cleared from the impeller and its surrounding area.
  • Reattach the access panel securely, making sure it is properly aligned.
  • Turn on the power supply and test the unit to see if the problem is resolved.

Bad Relay or Main Logic Board:

A faulty relay or main logic board can disrupt the electrical signals and control functions of the Pentair Prowler 920, leading to starting and stopping issues.


  • Identify the relay or main logic board responsible for controlling the unit’s operation. Refer to the manufacturer’s documentation or user manual for guidance.
  • If a spare relay is available in the equipment box, follow these steps:
  • Ensure the breaker is turned off to prevent electrical accidents.
  • Disconnect all wires connected to the faulty relay.
  • Transfer and reconnect all the wires onto the spare relay, ensuring they are properly secured.
  • If required, make any necessary adjustments to the wiring on the top of the relay.
  • Turn on the power supply and test the unit to check if it functions correctly.
  • If the problem persists or there is no spare relay available, consider contacting a professional technician or the manufacturer’s customer support for further assistance.

Moisture Accumulation in the Circuits:

Moisture can infiltrate the internal circuits of the unit, leading to electrical malfunctions and unexpected start-stop behavior.


  • Power off the Pentair Prowler 920 by switching off the breaker and unplug it from the power source.
  • Open the unit carefully, following the manufacturer’s instructions or user manual.
  • Inspect the internal circuits for any signs of moisture, such as water droplets or dampness.
  • If moisture is present, use a soft cloth or towel to carefully absorb and remove the moisture.
  • If the moisture has caused damage to any components, consider contacting a professional technician or the manufacturer’s customer support for repairs or further guidance.
  • Once the moisture is removed, allow the unit to dry completely before reassembling and reconnecting it.
  • Power on the unit and test its functionality to check if the issue is resolved.

Faulty Pentair Prowler 920 Power Supply or Motor Unit Issues:

Problems with the power supply or motor unit can result in irregular functioning of the Pentair Prowler 920, leading to starting and stopping problems. These components often require professional intervention and are not recommended for DIY repairs.


Due to the complexity and potential risks involved in addressing power supply or motor unit issues, it is advisable to contact a qualified technician or the manufacturer’s customer support for diagnosis, repairs, or replacements. They have the expertise and equipment necessary to handle these specific problems safely and effectively.

Remember, if you are not confident or comfortable performing any repairs or troubleshooting, it is best to seek assistance from a professional technician or contact the manufacturer’s customer support for guidance.

How to prevent Pentair Prowler 920 starts then stops problem?

To prevent the issue of the Pentair Prowler 920 starting and then stopping, you can take the following preventive measures:

Regular Cleaning and Maintenance:

  • Clean the pool or spa regularly to minimize debris accumulation. This helps prevent clogging of the impeller and other components.
  • Routinely inspect and clean the filter and skimmer baskets to ensure proper water flow and prevent debris from reaching the cleaner.

Maintain Proper Water Chemistry:

  • Keep the pool or spa water properly balanced with appropriate pH, alkalinity, and sanitizer levels. Balanced water chemistry helps prevent corrosion and damage to electrical components.

Protect from Moisture:

  • Ensure that the Pentair Prowler 920 is stored in a dry and sheltered location when not in use. Avoid exposing it to excessive moisture or rainwater.
  • When opening the unit for maintenance or cleaning, take precautions to prevent moisture from entering the internal circuits. Use a dry cloth or towel to absorb any moisture if it is present.

Proper Power Supply:

  • Ensure that the unit is connected to a stable and appropriate power supply. Avoid using extension cords or power outlets that are not designed for heavy-duty equipment.
  • Check the power supply regularly for any signs of damage or wear. Contact a professional electrician for inspection and repair if you notice any issues.

Follow the Manufacturer’s Guidelines:

  • Read and follow the manufacturer’s instructions and guidelines for Pentair Prowler 920 Bluetooth Setup, operating, and maintaining the Pentair Prowler 920. These guidelines are designed to ensure the proper functioning and longevity of the unit.

Professional Servicing

  • Schedule regular servicing and inspections of the Pentair Prowler 920 by a qualified technician. They can identify and address any potential issues before they escalate and cause the unit to start and stop unexpectedly.

Following these preventive measures can minimize the chances of the Pentair Prowler 920 experiencing starting and stopping problems and ensure its optimal performance.

Pool Cleaner Starts Then Stops

If your pool cleaner starts up and then stops soon after, it is likely due to an issue with the motor or suction. This problem can usually be solved by unclogging any debris that may have gotten stuck in the filter bag, checking for blockages along the vacuum hose, or replacing the pump motor if needed. If you’re unable to resolve this issue yourself, contact a professional pool technician as soon as possible so they can diagnose and repair any potential issues that may be causing your cleaner to malfunction.

Pentair Prowler 920 Warranty

Pentair’s Prowler 920 robotic pool cleaner is backed by a 2-year limited warranty that covers defects in materials and workmanship. The warranty does not cover damage caused by misuse, improper installation, negligence or normal wear and tear. Replacement parts are covered for 90 days from the original purchase date.

If your product fails due to a manufacturing defect within the two year period, Pentair may elect to repair or replace it at their discretion with either new or refurbished parts and components.

Prowler 920 Not Moving

If your Prowler 920 isn’t moving, you should first check that the battery is properly connected and charged. If it has been sitting for a while, charging or replacing the battery may be necessary. Also, ensure that all connections are secure and don’t have any corrosion.

Once these steps have been taken, inspect the drive belt to ensure it’s in good condition; if not, replace it with an identical model for your vehicle. Lastly, look at other components like linkages and motors to see if they’re functioning correctly as well.

Pentair Prowler 920 Control Panel Not Working

If you are having trouble with your Pentair Prowler 920 Control Panel, it could be due to a faulty power source or wiring issue. If the control panel is not receiving power, it will not function properly. Additionally, if the wiring is loose or corroded, it can cause problems with its operation.

To fix these issues, you’ll need to check all the connections and verify that they are securely connected and corrosion-free. If none of these solutions resolves your problem then replacing the control panel itself may be necessary.

Pentair Prowler 930 Troubleshooting

If you’re having trouble with your Pentair Prowler 930, you can take a few steps to troubleshoot the issue. First, check that the power cord is properly connected and receiving power from an outlet. If it is, inspect the pump strainer basket for debris or clogs preventing water from circulating properly.

Additionally, check the filter pressure gauge to ensure it reads within normal operating range. Finally, if necessary, refer to your manual for instructions on how to reset different settings or components of your pool cleaner such as timers or motor speed controls.

Dolphin Pool Cleaner Starts Then Stops

If you have a Dolphin pool cleaner that starts and then stops, it could be due to an air leak in the suction cleaning system. To check for this, inspect all of the hoses, connections, and clamps for any damage or looseness. If you notice any issues with your connections, tighten them as required or replace damaged components with new parts.

Additionally, make sure your filter bag is properly installed and there are no obstructions blocking the intake valve. If these tips do not resolve the issue with your Dolphin pool cleaner starting and stopping abruptly, contact a professional repair technician to diagnose and fix the problem.

Pentair Prowler 920 Starts Then Stops


How Do I Reset My Prowler 920?

To reset the Prowler 920, follow these steps: 1. Turn on the machine and press “Menu”. 2. Scroll to “Settings” and select it.

3. Select “Reset All Settings” or “Factory Reset”. 4. Choose “Yes” when asked to confirm that you want to reset your system settings back to their defaults. This should restore your Prowler 920’s factory settings and allow you to start fresh with a clean slate!

Why Does My Pool Cleaner Keep Stopping?

Your pool cleaner may keep stopping for a variety of reasons. Here are some common culprits: – Clogged filter bag: When the bag is clogged, it restricts water flow and reduces suction power.

This can cause your cleaner to lose its grip on surfaces or become stuck in one spot. – Low water levels: If your pool’s water level drops below the skimmer line, this can affect suction as well. Your cleaner may struggle to stay afloat and possibly get stuck on obstacles near the bottom of the pool.

– Damaged parts: Over time, wear and tear can take its toll on your equipment – wheels, gears or other moving parts may need replacing if they become worn out or broken. Checking these components regularly will help you identify problems early before they interrupt cleaning cycles for too long.

Why Does My Dolphin Pool Cleaner Start Then Stop?

My dolphin pool cleaner starts then stops due to one of the following reasons: -Clogged filter basket. -Clogs in the hose.

-Debris stuck in the impellor or pump. -A defective motor, circuit board, or switch. It is important to identify and address what is causing your pool cleaner to start then stop as soon as possible so that it can effectively clean your pool again.

How Do I Reset My Maytronics Power Supply?

• Unplug the power supply from the wall. • Remove all connections to the robot and pool cleaner. • Hold down both buttons on the box for 10 seconds, then release them simultaneously.

• This will reset your Maytronics power supply back to its factory settings. Resetting your Maytronics power supply is easy and straightforward. Firstly, unplug it from the wall socket and remove any connections between it and a robotic pool cleaner or other device you may have connected to it.

Then press both buttons on the box at once for exactly 10 seconds before releasing them simultaneously; this will reset your power supply back to its original factory settings in no time!

How to fix a Maytronics Active20/30/60/Dolphin when it runs a few seconds and stops


The Pentair Prowler 920 is a great pool cleaner for both small and large in-ground pools. However, if it starts then stops during operation, the cause of this issue could be either an air leak or a faulty control board. Fortunately, identifying and rectifying these problems is quite straightforward by following the steps listed above.

With some simple troubleshooting techniques, you can quickly get your pool cleaner up and running again!

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