6 Steps To Solving Pool Temperature Sensor Not Working

pool temperature sensor not working
pool temperature sensor not working

The pool temperature sensors might not be one of the most useful smart devices in your home, but they can surely help you increase control over the swimming area.

So, if you’re looking for an upgrade and need to keep track of the pool at all times, investing in a pool thermometer is not a bad idea.

Aside from the obvious benefits of more information about the temperature, you can optimize the power consumption through the heating element by integrating a pool temperature sensor in the setup.

So, be sure to keep that in mind if you’re thinking about an upgrade.

There are many brands in the market when it comes to reliable pool temperature sensors. However, poor installation of these units can often lead to performance issues.

So, be sure to keep all that in mind, and you will not have to deal with more errors down the road. 

You will often notice customers complaining about pool temperature sensors not working. So, here are some troubleshooting steps that can help you through the process.

Resolving Pool Temperature Sensor Not Working

  1. Swap Sensors

Swapping the sensors in your control unit should be one of your first steps when the pool temperature sensors are not working.

Instead of buying a new unit immediately, try to switch the air temp sensor with the water temp sensor and then test out the reading on the main panel again.

If this fixes the issue, then you were just dealing with minor bugs in the system that are eliminated by swapping the installed sensors. So, follow a similar method before checking the wiring or purchasing new sensors.

Ninety percent of the time, owners are sorted out right here, and you will not have to deal with more errors down the road.


So, be sure to swap out the sensors and then check up on the performance one more time. You’ll surely be able to figure out a reasonable response from the system. 

  1. Check Wiring

If the water sensors are still not working, then you need to check the wiring installed in the system.

It is likely that you’re dealing with broken or kinked sections in the wiring that need to be fixed to get an accurate reading from the water sensors.

Ideally, this fix shouldn’t take much time, and you can rely on a multimeter to narrow down the problem.

So, check the individual wires and isolate the issue to damaged sections. Hopefully, you will not have to deal with much hassle when it comes to repairing the damaged wires. 

The smarter decision here is still to hire a local contractor or a technician. There is no point in guessing the issue and spending hours trying to fix the wiring on your own.

There is a chance that you will further complicate the situation.

So, instead of going through all of these solutions on your own, you should get some professional help. That might be a bit heavy on your budget, but you will not have to deal with the same errors down the road. 


All that you have to do is to spend a bit of money and then explain the situation to a local contractor.

He will make life much easier for you, and you will not have to go through any of these fixes when it comes to addressing pool temperature sensors not working. 

  1. Clean Connection Points

If you’ve had the temperature control unit installed with your pool for a long time, then there is a good possibility that you’re running into problems with the corroded connection points.

Excessive humidity and moisture are the primary reasons behind this error, but you can fix it pretty easily by cleaning the connection points.

All you have to do is purchase some rust cleaner from the market or make your own by mixing vinegar with water. After that, you can rely on a damp cloth to remove extra rust from the system.

Hopefully, that will be it, and the sensors will start working perfectly in due time.

However, if that is not the case, then you will have to put your focus on the control board. The issue might be with the main board, and you can address that situation first. 


  1. Fix Control Board

The control board in your system can also be the reason behind temperature sensors not working.

If you’ve checked the connection points and the wiring linking the sensors with the main unit, then your next step should be inspecting the control board with a multimeter.

If you believe that the control board is defective or fired, then call the dealer to forward a warranty claim.

You can’t do much when it comes to fixing the control board yourself. So, involve the dealer, and he will help you source a replacement without spending too much money on a new unit.

  1. Replace Sensor

It is also possible that the sensors have gone bad, and if you’ve installed a Pentair control system in your pool, then the chances of this being a defective sensor increase by a substantial margin.

Here the only thing you can do is spend 50 dollars on a new sensor to get everything working again.

The installation of the new sensor is pretty easy, and as long as there are no defects in the control board, you will start to get the right reading from the water sensor.

So, if your pool temperature sensor has stopped working, replacing it is the only real option left.

  1. Check For Installation Issues

If you’re sure that there are no issues with the hardware and the wiring is in good shape, then you might have just messed up the installation.

The issue with the installation is that it can be pretty complex, especially when you’ve not managed any smart units before.

So, if you’re new to the market and don’t know how to handle this device, just get pointers from the experts.

expert help

You need details on how to go about the installation, and going through the online guides or the manual one more time will serve you well. 

All that you’re trying to do here is make sure that there are no issues with the installation of the unit and that the wiring is managed properly. From there, you can set up the sensors for more time, and you will be sorted. 

There are many great videos available on YouTube that can help you here. Even if you’re not that experienced, relying on YouTube videos is a good idea, and you will be best served with a physical demonstration of the process.

Similarly, you can open up a support thread on the online community forums.

That way, you can connect with local experts without having to go through all of these errors on your own. So, be sure to reach out, and you will be sorted out in no time. 

It all comes down to how you’re planning on addressing the issues, and seeking official support is a good idea. Hopefully, that will be it, and you can further look towards technical support to help you limit these errors.

  1. Hire Technical Support 

If you can’t seem to put your finger down on the main cause of this issue, then calling technical support should be your next step.

Customer Support
Customer Support

The professionals from customer support will help you narrow down the issue and will guide you through the troubleshooting process.

In most situations, you will just be dealing with a defective unit that has to be replaced. So, if you’re using a Pentair system, just test your luck with a new sensor, and everything will start working again.

You will still have to pay 50 dollars for the sensors, but at least the wiring and the control board will be in good condition.

Wrapping Up

The situation with the Pool Temperature Sensor Not Working can be a bit challenging.

However, we have listed some of the more viable solutions that will help you out. All that you have to do is to follow along with these pointers, and you will be sorted in due time.

It all comes down to how you’re planning on addressing the situation.

As long as the sensors are in good shape, you just have to check up on the wiring and the connection points. There might be a bit of damage to the wiring, and you need to replace that accordingly. 

However, the smarter decision is to always have an expert check the system for you.

There is no point in risking your safety while trying to check up on the wiring yourself, and you need to reach out to the local contractors. They will help guide you through these issues.

Yes, you will have to spend a bit of money on hiring a contractor.

However, spending a few bucks will save you from hours of hassle, and you will not have to risk electrocuting yourself while trying to manage the sensors. So, be sure to reach out, and you will be sorted in no time. 

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